Ali punches a mattress and then punches a wall with the same force. Why does Ali experience more pain while striking the wall?
Correct answer: B. The rate of change of momentum while striking the wall is higher
- A. The rate of change of momentum while striking the wall is lower
- B. The rate of change of momentum while striking the wall is higher
- C. The wall does not move
- D. The mattress applies an equal and opposite force
Explanation
The rate of change in momentum when you hit the wall is more than when you hit a piece of sponge with an equal force.The rate of change in momentum is directly proportional to the force applied. Hitting a wall will hurt more than hitting the mattress. This can be explained as follows-Wall is hard, When you hit a wall, an equal reaction force acts on the hand and hurts it. When you hit the mattress, a part of the momentum of hand is transferred to the sponge. As a result, it gets deformed and the reaction is much less than the action.
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