two rubber balls travel towards a wall with the same speed. one of the rubber balls has been dipped in super glue, and sticks to the wall. the other ball bounces off and heads in the opposite direction with the same speed. if each ball is in contact with the wall of the same amount of time, which ball exerts more force on the wall? what is the ratio of the forces between the two cases (how many times greater is one force compared to the other?) explain.

Question

two rubber balls travel towards a wall with the same speed. one of the rubber balls has been dipped in super glue, and sticks to the wall. the other ball bounces off and heads in the opposite direction with the same speed. if each ball is in contact with the wall of the same amount of time, which ball exerts more force on the wall? what is the ratio of the forces between the two cases (how many times greater is  one force compared to the other?) explain.

anonymous · Answer

You'll want to use the fact that force is equal to the rate of change of momentum.  Since each ball is in contact with the wall for the same amount of time, the difference in force will just be the difference in the change of momentum.  How does the momentum change for each ball?

anonymous · Answer

it depends actually as u can see mass changes on dipping but if u take it approx negligible then both exert same force as the only change appears according to u is not due to momentum is due to addehesive force of the super glue :) i think it clear :)