AP Physics- Impulse

A tennis ball traveling at 25 m/s has a mass of 58.5 g and bounces off a wall with a speed of 22.5 m/s. The impact took 3.33 ms. What is the magnitude of the average force exerted by the wall on the tennis ball?

I want to solve for acceleration to plug into F = ma, but the problem is that I do not know distance/displacement. How else might I find acceleration, or is there a totally different approach?

Thank you!

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  1. It told you to use impulse (momentum) not F= mA
    (Same thing but not getting into that)

    average force = change in momentum/ time

    change of momentum = .0585 (25+22.5)
    time = 3.33*10^-3 seconds

    now divide

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