Center of Mass, Momentum & Collision

JEE Main level, single correct, medium

76 of 130

Question 76 of 130

In two different experiments, an object of mass 5kg5kg moving with a speed of 25ms−125{ms}^{-1} hits two different walls and comes to rest within
(i) 33 second, (ii) 55 seconds, respectively.
Choose the correct option out of the following :

Show answer and solution

Answer: (B) Impulse will be same for both the cases but the average force will be different.

Impulse == Change in momentum
I=ΔPI=\Delta P
Therefore, in both the cases the impulse is same.
Average force is defined as,
Favg=ΔPΔt{F}_{avg}=\dfrac{\Delta P}{\Delta t}
Since the time in the two cases is different, the average force will be different.

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