Compare the collision between two baseballs and a catcher's mitt. Case A: A baseball pitched at 40 m/s collides with a catcher's mitt and is brought

to a stop. The catcher holds the mitt rather rigidly and retracts backwards very little

as the ball strikes the mitt

Case B: An identical baseball pitched at 40 m/s collides with a catcher's mitt and

is brought to a stop. The catcher holds the mitt with a relaxed arm and retracts

backwards 30 cm as the ball strikes the mitt.

Case A

Case B

Before

After

Before

After

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Which variable is different for these two cases?

Which Case involves the greatest momentum change?

Which Case involves the greatest impulse?

Which Case involves the greatest force ?

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