Verified Solution • 2025–26 Session moderate

QJEEM22Phd481: JEE Main 2022 Physics - Class 11 JEEM22Phd481 Solution: A balloon has mass of in air. The air escapes from the balloon…

A balloon has mass of 10 g10 \mathrm{~g} in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm/s4.5 \mathrm{~cm} / \mathrm{s} . If the balloon shrinks in 5 s5 \mathrm{~s} completely. Then, the average force acting on that balloon will be (in dyne).

Multiple Choice Options

  • A 3
  • B 9
  • C 12
  • D 18

Step-by-Step Verified Solution

Favg=μ×vrel{F_{avg}} = \mu \times {v_{rel}}

=105×4.5=9= {{10} \over 5} \times 4.5 = 9

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring