JEE Main 2022PhysicsLaws of MotionEasyMCQ

JEE Main 2022 — Laws of Motion Question with Solution

JEE Main 2022 (28 Jul Shift 1)

Question

A balloon has mass of 10 g in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm s-1. If the balloon shrinks in 5 s completely. Then, the average force acting on that balloon will be (in dyne).

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Show full solutionCorrect option: B
Correct answer
B9

Step-by-step explanation

Given that the mass of the air m=10 g and it escapes in time t=5 s with velocity v=4.5 cm s-1.

The average force on the balloon can be given as,

F=vdmdt

⇒F=4.5×105=9 dyne

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About this question

This is a previous-year question from JEE Main 2022, 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.