Question

A person hit harder when he falls on a concrete floor than when he falls on a heap of sand from
the same height. Why?
1
Two identical bullets are fired one by a light rifle and another by a heavy vehicle with same
force. Which rifle will hurt more and why?

2
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Answer 1

Answer:

A person hit's harder when he falls on a concenfre floor as he brought rest into a faster time so force effect will be more whereas in heap of sand he brought rest into slower time and the effect of force will be slow.

2-The rifle which is light will hurt more

Explanation:

2-So to reduce recoil velocity we use heavy rifle but that is large momentum but for light rifle the recoil velocity will be more due to small mass.