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PostSubject: homework help   Sun Mar 09, 2008 7:18 pm

A tennis ball of mass m = 0.050 kg and speed v = 45 m/s strikes a wall at a 45 angle and rebounds with the same speed at 45 (What is the impulse given the wall?
Magnitude

ok demon figure it out man! ^^ i bet she'll thank u a lot
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PostSubject: Re: homework help   Mon Mar 10, 2008 11:07 pm

Magnitude of the impulse is
I = 2mvcosθ
= 2(0.050kg)(45m/s)cos45o
= 3.18 kg.m/s
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