JEE Main 2021PhysicsLaws Of MotionSpring ForcemediumMCQ

JEE Main 2021 — Laws Of Motion Question with Solution

From: JEE Main 2021 (Online) 26th February Evening Shift

Question

Two masses A and B, each of mass M are fixed together by a massless spring. A force acts on the mass B as shown in the figure. If the mass A starts moving away from mass B with acceleration 'a', then the acceleration of mass B will be :

JEE Main 2021 (Online) 26th February Evening Shift Physics - Laws of Motion Question 91 English

This question includes a diagram. The text above accompanies the figure.

Choose an option

Show full solutionCorrect option: D
Correct answer
D

Step-by-step explanation

Let spring force acting on the both block is Fs.

F.B.D. of Block A

JEE Main 2021 (Online) 26th February Evening Shift Physics - Laws of Motion Question 91 English Explanation 1

Fs = Ma ..... (i)

F.B.D. of Block B,

JEE Main 2021 (Online) 26th February Evening Shift Physics - Laws of Motion Question 91 English Explanation 2

Acceleration of Block B,

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About this question

This is a previous-year question from JEE Main 2021, covering the Laws Of Motion 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.