Circular motion in vertical plane class 11. Its examples are projectile motion, circular motion.

Some of the examples are roller coasters, cars on hilly roads, etc. Centripetal acceleration in horizontal motion. For the analysis of such motion, our reference is an origin and two co-ordinate axes viz: X and Y-axis and scalar and vector physical quantities. The resultant of two forces P and Q is R. These MCQ Questions for Class 11 Physics with answers clear for a fast revision. Consider the particle when it is at the point P and the string makes an angle θ Circular Motion Examples. When the car is taking a turn on the road, a total of three forces act simultaneously on the car: The weight of the car, mg. me/ZAZB/bqzbnwea 👈🏻📕Class 11th + JEE MindMap Hard Copy : https://bit. 859 × 10–4N. Hope the information shared regarding the NCERT MCQ Questions for Class 11 Physics Chapter 4 Motion in a Plane with Answers Pdf free download is true and genuine as far Mar 28, 2024 · One way to have a force that is directed towards the center of the circle is to attach a string between the center of the circle and the object, as shown in Figure 6. Bending of Cyclist:- θ = tan -1 ( v2 / rg) (a) Velocity of the cyclist:- Greater the velocity, greater is his angle of inclination with the vertical. Moreover they help you arrive at the class 11 Physics solutions to the chapter-wise questions answers. Chapter 1 Units And Measurements Chapter 2 Motion In A Straight Line Chapter 3 Motion In A Plane Chapter 4 Laws Of Motion Chapter 5 Work, Energy And Power It is categorized as a non-uniform circular motion as a result. 10. Chapter 5 Laws of Motion. The angle made by him, with the vertical is. Here, we have provided case-based/passage-based questions for Class 11 Physics Chapter 4 Motion In A Plane. For a particle performing uniform circular motion, choose the correct statement (s) from the following: (a) Magnitude of particle velocity (speed) remains constant. onelink. Chapter 9 Mechanical Properties TRµ3. magnetbrains. N = mgcosθ – mv 2 /2. a centripetal acceleration ac= ω2r = v2/r directed inward toward the centre of the circle. 1. 0314 N (2) 9. For the analysis of such type of motion (i. 2. 5 gr on the horizontal frictionless surface as shown in the fig. Name the five physical quantities which change during the motion of an oblique projectile. Class 12; Class 11 Engineering; Class 11 Medical; Class 9 & 10. Our topic for today is a different type of motion, called vertical circular motion. For a mass moving in a vertical circle of radius r = m, if we presume that the string stays taut, then the minimum speed for the mass at the top of the circle is (for g = 9. b) Centrifugal force. ly/YTAI_Jee🌐PW Website - https://www. Download as PDF. The force that keeps the body moving in circular motion is _______. Centripetal acceleration is the rate of change of tangential velocity. Question 1. (b) its motion is circular. Dec 9, 2021 · 2. For any velocity above this minimum, we can use conservation of energy to NCERT Solutions Class 11 Physics Chapter 4 – Free PDF Download. Projectile motion is one of the most common examples of motion in a plane. A body is moving in a vertical circular motion. 21 m/s. For PDF Notes and best Assignments visit http://physicswallahalakhpandey. (D) Motion in one dimension. Jul 8, 2024 · Motion in a Plane Class 11 comes under the subject Physics Chapter 4. 34 View Question. Hence in 0. 5 m long string and whirled in a horizontal circle at 15 m/s. * According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 3. Its resultant displacement from O. com/Live Classes, Video Lectures, Test Series, Lecturewise notes, topicwise DPP, dyn Dec 16, 2020 · In this video Narendra (IITB 2003, Purdue Univ) Sir will quickly summarize all the important point, formulas and concepts for circular motion class 11 physic 2 days ago · The motion in a vertical circle is considered nonuniform as the influence is observed the most at the lowest and the least at the highest point of the path. 7. Chapter 4 Motion In A Plane. com. When a stationery bus suddenly starts moving passenger’s head gets jerked in the backward direction. Download Chapter 4 Motion In A Plane MCQs PDF by clicking on . So here we are presenting derivations for Motion in 2D. in This force is known as centripetal force. (b) mercury. Out of these, the vector quantities are. Chapter 4 Physics Class 11 NCERT Solutions have been prepared to keep in mind the latest syllabus prescribed by the As v1 = √gR putting it in equation number (2) We have 1/2 m v2 = 2mgR + 1/2 mgR. Skidding of the vehicle on a level road: When a vehicle makes a turn on a circular path it requires centripetal force. Question 10. State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity. 11. Apr 27, 2023 · Motion in a Plane. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. The velocity of anybody undergoing motion in a vertical circle is given by v = u2 − 2gh− −−−−−−√. In this type of motion, the object continuously changes its direction as it moves around the circle, while its speed remains constant. Angular Position-The angle which is made by the position vector with the given line is called angular position. Its examples are projectile motion, circular motion. 4) Radial (centripetal) acceleration = ω2r. S-15, 2nd floor Uphar Cinema Market, above Red Chilli Restaurant, Green Park Extension, New Delhi, 110016. e. Therefore, equations of motion can be applied separately in X-axis and Y-axis to find the unknown parameters. A particle moves in the X-Y plane with a constant acceleration 1. A plane comes out of a power dive, turning upward in a curve whose center of curvature is 1300 m above the plane. ly/YTAI_CW🌐PW Websi NCERT Solutions For Class-11 Physics Chapter Wise. This knowledge ensures a better understanding of the topics further up in Physics. 3 Define centripetal force. Solution: From the laws of motion in the case of rotational motion, We know that ω = ω 0 + αt. , projectile motion, circular motion etc. (a) directed inwards from P, to the centre of the circle. Normal reaction of the road on a concave bridge. 1) Its speed is constant. At the bottom (y=up): ΣF r = N - mg = ma r = m v 2 /r N = m v 2 /r + mg. MCQs on Class 11 Chapter 4 Motion In A Plane. Also, when an object is moved in a circular motion, then the equation of the motion is derived here. Available here are Chapter 3 - Motion in a Plane Exercises Questions with Solutions and detail explanation for your practice before the examination Circular Motion in a Vertical Plane. a. The speed of the particle and the tension in the string at highest point of the circular path are (g=10 ms-2) Jun 29, 2022 · Answer: (c) The resultant of any three vectors will be cancel out by Fourth vector. 0 m. ly/Class11th_JEE_MindMap 👈? Jan 10, 2022 · 📝 For complete notes of Lectures, visit RAFTAAR NEET Batch in the Batch Section of PhysicsWallah App/Website📲PW App Link - https://bit. Students are encouraged to practice the Class 11 Physics MCQ Questions of Motion in a Plane with Answer is accessible here. com/@DynamicVidyapeeth/playlists?view=50&sort=dd&shelf_id=3Physical World https://youtube. Chapter 1 Physical World. The particle is just 'looping the loop'. Class 11 Physics MCQ – Uniform Circular Motion. Find out radial acceleration, tangential acceleration, and radius of curvature of a curved trajectory. Crucial feature of uniform circular motion in the vertical plane: Constant downward force of gravity; Non-Constant upward normal force Step 5: Apply Newton's second law. The angle θ in the figure is: A vehicle is moving with uniform speed along horizontal, concave and convex surface roads. Circular Motion (NCERT) - Class 11 PDF Download. 8527521718. Therefore, f c = m R ω2. (a) its acceleration is constant. For example – Circular Motion, Projectile Motion, etc. Kinetic energy and speed. For the analysis of such motion our reference will be made of an origin and two co-ordinate axes X and Y. At t = 0 the particle is at the origin and its velocity is 8. May 27, 2024 · These are also the class 11 Physics summary that help you read the portion quickly. Question 3: A bus is moving in a circular track of radius 1000cm with a speed of 10m/s. Here the angular velocity is 11 rad/s. When a particle moves in a plane such that its distance from a Aug 31, 2020 · Motion in a Plane (Projectile and Circular Motion): In this chapter or under this topic, we are going to come across the motion of the object when it is thrown from one end to another end. The resultant acceleration is the vector The component of any net force that causes circular motion is called a centripetal force. Time period of conical pendulum:-T = 2π √ l cos θ / g. Circular motion refers to the movement of an object along a circular path. Get free Balbharati Solutions for Physics 11th Standard Maharashtra State Board Chapter 3 Motion in a Plane solved by experts. , force which produces the motion. 2) A car of mass 1450 kg is driven around a bend of radius 70. Class 11 & 12. 1 solutions Rotational Mechanics exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. com/out/magnet-brains ️📚👉 Get All Subjects Circular motion basics: Angular velocity, period, and frequency. Answer: Five physical quantities are velocity, the vertical component of velocity, momentum, kinetic energy, potential energy. Period and frequency when talking of horizontal force are as follows: T = total time/number of revolutions. Derivation 1: Time of Flight, Horizontal Range, Maximum Height and Equation of Path of Projectile in Projectile Motion. Define UCM. In case of vertical circular motion this is the minimum velocity that a body must be given at the lowest position to complete a vertical circle. Chapter 2 Units and Measurements. (c) its velocity is constant. A particle of mass m is attached to a light and inextensible string. Two-dimensional motion or motion in a plane is a circular motion. The approximate maximum speed of car will be, if friction between tyres and road is 0. b. 0 m/s along the X-axis. The position of the object P at a given instant Oct 17, 2023 · 📕JEE 2024 MindMap Batch: https://physicswallah. MCQ Circular Motion, Class 11 Physics. 📝 For Lecture notes, visit Raftaar JEE Batch in Batch Section of PW App/Website. Calculate the upward force of the seat cushion on the 100 kg pilot of the plane. 5 rad. The time taken by the object to complete one revolution on its circular path is called time period. For instance - Suppose a particle P is moving in a circle having radius r and center O. Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE. When a disc containing mercury and water is rotated rapidly about a vertical axis, then the outermost place in the disc will be taken by: (a) water. Normal reaction on a convex bridge. A cyclist goes round a circular path of circumference 343 m in s. Find out position, velocity and acceleration vectors of a particle in uniform circular motion in cartesian coordinate system, and polar coordinate system. 𝐂𝐥𝐢𝐜𝐤 𝐇𝐞𝐫𝐞 𝐓𝐨 𝐌𝐞𝐞𝐭 𝐒𝐡𝐢𝐦𝐨𝐧 𝐒𝐢𝐫 & 𝐒𝐡𝐫𝐞𝐲𝐚𝐬 𝐒𝐢𝐫 👉 https://vdnt. com ️📚👉 Get Notes Here: https://www. 4 Derive the expression for centripetal acceleration and use it to solve problems related to centripetal force. Answer. Case Study Questions: Question 1: Projectile motion is a form of motion in which an object or particle is thrown with some initial velocity near the earth’s surface and it moves along a curved path under the action of gravity alone. The forces on the object are thus: →Fg. Jun 14, 2024 · Maharashtra State Board 11th Physics Solutions Chapter 3 Motion in a Plane. 5. 2) Velocity is changing at every instant. The other end of the string is fixed at O and the particle moves in a vertical circle of radius R equal to the length of the string as shown in the figure. Sep 2, 2023 · #physics #neet #circularmotion #verticalcircularmotion #verticalplane #jee #cbse #ncert #trending #motioninacircle #angularmotion #angularforbeginners #phys Mar 19, 2021 · Change in momentum = Force × time = mg × u sin θ g = mu sinθ. 0 g sample of blood in the pilot's head. Ans. Motion in a plane involves movement in two dimensions, while motion in a straight line occurs only along a single dimension. The net force causing the centripetal acceleration of an object in a circular motion is defined as centripetal force. Thus we get. (a) impulse, pressure and area. A smaller catapult of pole length r throws another watermelon from one end of a pole which rotates about an axis at the other end with the Motion in a plane is also referred to as a motion in two dimensions. Question 3. Case Study/Passage-Based Questions. Jul 12, 2024 · This is due to the circular motion. Jan 16, 2020 · Solution: Ans: Velocity of stone at the lowermost point = 4. A small block slides with velocity v 0 = 0 . Mar 23, 2024 · Motion in a Plane Numerical Based on Resolution of Vectors, Laws of Vector Addition and Relative Velocity Class 11 Nootan ISC Physics Solutions Ch-5. Find the position of the particle at t = 4. Choose the correct option. (b) Radius of curvature:- Smaller the radius, greater is the angle with the vertical. Circular Motion Questions for CBSE Class 11th. 8 m/s 2) m/s. From the given data : ω 0 = 900rpm = 900 x 2π/60 rad/s. Consider the mass of a body m and the magnitude of the centripetal force f c, f c = mass × acceleration. com/playlist?list=PLgRdr6oVcc Motion in a Plane Class 11 Notes Physics Chapter 4. Please wait while the PDF view is loading. 0 s. Jan 10, 2022 · 📝 For Lecture notes, visit Raftaar JEE Batch in Batch Section of PW App/Website. Page 1. 83 m/s, The velocity of stone at the topmost point = 2. youtube. N = mgcosθ + mv 2 /2. 3. 3) There is no tangential acceleration. Centripetal force is not something new. • Force Force is an external cause in the form of push or pull, which produces or tries to produce motion in a body at rest, or stops/tries 4 days ago · NCERT Solutions for Motion in a Plane Class 11 Physics is provided in the form of a free PDF as this chapter is very important from the examination point of view. Vertical Circular Motion. This implies that in one second the stone rotates by an angle of 11 rad. 3 days ago · Kinematics of Circular Motion. If the string is under tension, the force of tension will always be towards the center of the circle. To download Lecture Notes, Practice Sheet & Practice Sheet Video Solution, Visit MANZIL Batch in Batch Section of PhysicsWallah App/Website. Name the physical quantity which remains same in an uniform circular motion. pabbly. This chapter is also called as Motion in 2D. Each MCQ will have four options here, out of which only one is correct. Question 4. Two particles are moving with common speed v such that they are always at a constant distance ' d ' apart and their velocities are always equal and opposite. 4. (C) Projectile motion. Hence, angular deceleration α = π/2. live/ 3 days ago · We have a body undergoing circular motion in a vertical plane as shown in the figure. Jan 19, 2024 · Motion in a Plane Class 11 Notes Physics Chapter 4. 97/1, 3F, Adhchini, Sri Aurobindo Marg, Near NCERT, New Delhi | 011-32044009 0. Learn the concepts of Class 11 Physics Motion in a Plane with Videos and Stories. Projectile Motion), the reference point will be made of an origin and the two coordinate axes X and Y. An intriguing and one of the most important topics for various government exams after 12th Science, Motion in a plane, which forms an integral part of the Physics syllabus for class 11, covers the basics of 2-d kinematics in a detailed way. NCERT Solutions for Class 11 Physics Chapter 4 Motion in a Plane is one of the important study materials for Class 11 students as it is one of the most scoring chapters in kinematics. 1. Download, print and study this document offline. Aug 3, 2023 · Here we are providing important derivations for class 11 Physics Chapter 4 Motion in a Plane. One of the most common examples of motion in a plane is Projectile motion. Question 5. 📲PW App Link - https://bit. If the motion of a particle is taking place in a vertical circle, the motion will be non-uniform. The plane's speed is 260 m/s. 5) v=ωr. Class 11 Physics https://www. Calculate the upward force on a 90. Jun 29, 2021 · Answer. When a roller coaste Jan 19, 2024 · When a body moves in a circular path with a constant speed, then the motion of the body is known as uniform circular motion. The direction of the centripetal force is Nov 21, 2023 · For an object tied to a string as it moves in a vertical circular motion, the tension at the bottom can be calculated using the equation below: Tension at the bottom of the circle = m (vB)^2/r Newton's laws of motion and kinematic principles are applied to describe and explain the motion of objects moving in circles; specific applications are made to roller coasters and athletics. live/study/batches/abhiyaan--telugu--001413/batch-overview 📲 a r = (Velocity) 2 /radius of motion of the object = v 2 /R. Chapter 3 Motion In A Straight Line. So, f = number of revolutions/total time, where time is measured in seconds and frequency in Hertz. Scalar Quantities. 95 m/s, The velocity of stone when the string is horizontal = 3. This is the condition for "weightlessness" in any curved motion in a vertical plane. • Dynamics is the branch of physics in which we study the motion of a body by taking into consideration the cause i. The word “uniform” refers to the speed, which is uniform Mar 17, 2013 · PG Concept Video | Circular Motion | Circular Motion and Angular Properties by Ashish AroraStudents can watch all concept videos of class 11 Circular Motion Using HC Verma Class 11, Class 12 Concepts of Physics Vol. Define Time Period and Frequency of UCM Dec 29, 2020 · Circular Motion Problems [for class 11] 1 ) A rock of mass 250 g is attached to the end of a 1. kg ms N m kg m s mg R mv F (100 )( 9 If not, the body will start accelerating in a vertical direction. 859 × 10 N –3(3) 6. Calculate the centripetal force and acceleration of the rock. Answer: (a) Given: Mass of the block = m Friction coefficient between the ruler and the block = μ Let the maximum angular speed be ω1 for which the block does not slip Now, for the uniform circular motion in the horizontal plane, we have: μ m g = m ω 1 2 L ∴ ω 1 = μ g L (b) Let the block slip at an angular speed ω2. When the net force is equal to the centripetal force, and its magnitude is constant, uniform circular motion results. Question 19. Please keep a pen and paper ready for rough work but keep your books away. Jul 12, 2024 · The motion of a body in a vertical circle when it is released from an altitude, travels vertically downwards towards the earth’s surface. In order to catch a moving bus safely we must run forward in the direction of motion of bus. org My Notes. Chapter 6 Work, Energy and Power. (d) none of these. 📲PW App Link - The NCERT Exemplar Class 11 Physics Chapter 4 PDF provides solutions to questions in the chapter Motion in a Plane Class 11, along with NEET questions and other important questions from the NCERT book, sample papers and previous years’ question papers. live/ See full list on khanacademy. A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. But f = 1/T. • Motion in a plane is called as motion in two dimensions e. Jun 14, 2022 · Case Study Questions for Class 11 Physics Chapter 4 Motion in a Plane. 5 Describe the motion in vertical circle, motion of vehicles on banked surface. 28 × 10 N (4) 9. May 10, 2023 · Applying the first equation of motion along the vertical and horizontal directions, we get: (b) Maximum vertical height, NCERT Solutions for Class 11 Physics All Chapters. 6. Jan 19, 2024 · Law of Motion Class 11 Notes Physics Chapter 5. (b) impulse and area. support@neetprep. (B) Rectilinear motion. Examples of circular motion include a car moving around a roundabout or a planet orbiting the sun. Circular Motion – Nirmaan TYCRP. We know that, v= R ω. (c) directed perpendicular to the plane of the circle, at P. This set of Class 11 Physics Chapter 4 Multiple Choice Questions & Answers (MCQs) focuses on “Uniform Circular Motion”. Consider the quantities pressure, power, energy, impulse, gravitational potential, electric charge, temperature and area. Chapter 8 Gravitation. This practice is said to be projection. g. Answer In this video, we will derive the circular motion equations for vertical circular motion situations by considering the centripetal force. (c) Direction of acceleration keeps changing as particle moves. If the centripetal force is absent then the circular motion is not possible. It would benefit the students to prepare for their assessments. Check the multiple-choice questions for the 11th Class Physics Motion In A Plane chapter. Newton's Universal Law of Gravitation is then presented and utilized to explain the circular and elliptical motion of planets and satellites. When a body P moves on a circular path, the centripetal acceleration is. The path followed by a projectile is Jun 17, 2023 · Question 4. (c) sometimes water and sometimes mercury. 5 s it will cover an angular displacement if 5. Watch his video lectures, download his PDF notes and Feb 2, 2022 · 6. Students have to pick the correct option and check the answer provided here. Tension will bring the weight into the balance between X Jul 10, 2023 · 🔰To Enroll Abhiyaan Batch For Free & Get Access to Class Notes & Other things: https://www. Curve turn-taking of a car is also an example of circular motion. 5 m. Chapter 7 System of Particles and Rotational Motion. me/sushantsawant9404circular motion class 11 one sho Full syllabus notes, lecture and questions for Circular Motion - Physics Class 11 - NEET - NEET - Plus excerises question with solution to help you revise complete syllabus for Physics Class 11 - Best notes, free PDF download For PDF Notes and best Assignments visit http://physicswallahalakhpandey. 3. The direction of a centripetal force is toward the center of rotation, the same as for centripetal acceleration. All the notes for class 11 students, subject-wise, are as follows. (b) Particle velocity remains directed perpendicular to radius vector. May 26, 2024 · Clarification: Angular velocity is the rate of change of angular displacement. If the stone make 15 revolutions in 25s. Motion in a Plane is a very important concept in Physics, which basically describes the change in position of an object over a period of your Feb 16, 2020 · ️📚👉 Watch Full Free Course:- https://www. The block leaves the surface at point C. It follows that. If the block takes 40 s to complete one round, the normal force by the side walls of the groove is : –2(1) 0. Jun 27, 2022 · JEE Main 2023 (Online) 29th January Morning Shift. The questions involved in HC Verma Solutions are essential questions that can be asked in the final exam. 6 Derive the period for conical pendulum. There will be total 10 MCQ in this test. Example – 02: A stone weighing 1 kg is whirled in a vertical circle at the end of a rope of length 0. Motion in a plane is called a motion in two dimensions. A car is moving on a horizontal curved road with radius 50 m. ω = 0 and t= 60s. Create your notes while watching video by clicking on icon in video player. On hitting used mattress by a stick, dust particles come out of it. Topics and Subtopics in NCERT Solutions for Class 11 Physics Chapter 4 Motion in a plane: QUESTIONS FROM TEXTBOOK. To get answer to any question related to motion in a vertical circle click here. Q. In motion in a plane, the object can move horizontally, vertically, or in any diagonal direction, whereas motion in a straight line is restricted to movement along a single path. (d) its motion is linear. Motion is an important concept in Physics, which basically describes the change in the Jul 18, 2022 · Motion In A Plane Class 11 MCQs Questions with Answers. Example: 7. At the top (y=down) ΣF r = N + mg = ma r = m v 2 /r N = m v 2 /r - mg. \displaystyle v=\,\sqrt { {5gR}} v = 5gR. Step by step solutions of Kumar and Mittal Physics of Nageen Prakashan as council latest prescribe guideline for upcoming exam. Uniform Circular Motion -Motion In Plane Class 11 PhysicsNEET Physics Class11Circular MotionAngular velocityangular accelerationClass 11 Physics Uniform Circ Dec 2, 2021 · circular motion class 11 one shot | short notes for neettelegram channel link Sushant Medico 😊https://t. Nov 20, 2020 · Question 2. A catapult of pole length 9 r throws a watermelon from one end of a pole which rotates about an axis at the other end with angular speed ω . com/Live Classes, Video Lectures, Test Series, Lecturewise notes, topicwise DPP, dyn Apr 14, 2023 · The motion takes place in a plane. This is the result of the gravitational force that is exerted by the earth. Jul 15, 2018 · Learn the concepts of circular motion, angular velocity and acceleration with Physics Wallah Alakh Pandey, a popular online physics teacher. 9. a) Centripetal force. In projectile motion, the only acceleration acting is in the vertical direction, which is acceleration due to gravity (g). (b) directed tangential to the circumference of the circle, at P. The motion of a car on a level road: Let us assume a car is moving on a level road, with mass ‘m’ and ‘g’ as the acceleration due to gravity acting upon it. An object thrown from a moving bus is on example of __________. Question 44. Question 43. • Scalar and Vector Quantities. Case Study 1: When an object follows a circular path at a constant speed, the motion of the object is called uniform circular motion. A block of 200 g mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius 20 cm. 7. The derivation of centripetal acceleration is very important for students who want to learn the concept in-depth. 15. a constant linear speed v = rω tangent to the circle and. (A) Uniform circular motion. 5 m/s2 in the direction making an angle of 37° with the X-axis. pw. A particle of mass 200 g is moving in a circle of radius 2 m. In case of non-uniform circular motion, there is some tangential acceleration due to which the speed of the particle increases or decreases. The following describes vertical circular motion with the equation, velocity, and tension: Vertical Circular Motion Equation If an object is attached to a rope and rotated vertically as shown below, Vertical Circular Motion. A stone tied to the end of a string 75 cm long is whirled in a horizontal circle with a constant speed. 7 Solve the numerical problem and conceptual question on circular motion. Step 6: Solve. xs lr ce xb wl nm vx eb da de