Laws Of Motion Question 266

Question: The time in which a force of 2 N produces a change of momentum of $ 0.4kg-m{{s}^{-1}} $ in the body is [CMEET Bihar 1995]

Options:

A) 0.2 s

B) 0.02 s

C) 0.5 s

D) 0.05 s

Show Answer

Answer:

Correct Answer: A

Solution:

$ \vec{F}=\frac{\Delta \vec{p}}{\Delta t}\Rightarrow \Delta t=\frac{|\Delta \vec{p}|}{|\vec{F}|}=\frac{0.4}{2}=0.2\ s $



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