JEE Main 2020PhysicsMotion In One DimensionEasyMCQ

JEE Main 2020 — Motion In One Dimension Question with Solution

JEE Main 2020 (06 Sep Shift 2)

Question

A particle moving in the xy-plane experiences a velocity dependent force F→=kυyi^+υxj^, where υx and υy are the x and y components of its velocity υ→. If a→ is the acceleration of the particle, then which of the following statements is true for the particle ?

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Show full solutionCorrect option: A
Correct answer
Aquantity υ→×a→ is constant in time

Step-by-step explanation

F→=kv→
⇒ F→‖v→
⇒ a→‖v→
⇒ v→×a→=0 always

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About this question

This is a previous-year question from JEE Main 2020, covering the Motion In One Dimension chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.