Solving Momentum Question: Tennis Ball vs Putty Ball

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SUMMARY

The discussion centers on a physics question regarding the momentum change of a tennis ball versus a putty ball when both are thrown against a brick wall. The correct answer is that the change in momentum of the tennis ball is greater because it rebounds after impact, while the putty ball sticks to the wall, resulting in no rebound and a lesser change in momentum. This illustrates the principles of elastic versus inelastic collisions in momentum analysis.

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kylepetten
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Hello!

I am doing a sample exam that was given out last year so I can prepare for this years coming exam, which means I also have the answer key. So, I know the answer to the question but I am no sure how to get it. Please help, thanks.

A tennis ball and a ball made of putty of the same mass are thrown against a brick wall. Which of the following statements is true?

a) the change in momentum of the tennis ball is greater
b) the change in momentum of the putty ball is greater
c) the change in momentum of both balls are the same
d) the change in momentum of both objects is zero

I know the answer is a), but I don't understand how it is. Thanks.
 
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Welcome to Physics Forums.

The tennis ball will rebound; the putty ball will stick to the wall.
 
Stonebridge said:
Welcome to Physics Forums.

The tennis ball will rebound; the putty ball will stick to the wall.

Ahh, I guess I was thinking too hard for that, haha. Thanks.
 

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