Hi. I just recently switched into a physics course midyear, and I really don't know whats going on. Help with a few of these questions would be greatly appreciated.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

A 2.5 kg ball strikes a wall at 8 m/s and rebounds at 7m/s. The ball is in contact with the wall for 0.2 seconds. What is the force on the wall?

2. Relevant equations

Im really not sure. Is this it?

F?t=?p

F(1)?t=m(1)v(1,f) - m(1)v(1,i)

F(2)?t=m(2)v(2,f) - m(2)v(2,i)

3. The attempt at a solution

I'm not sure how to apply that information into the equations, and I'm not even sure if the equations are right.

Please help

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# Homework Help: Momentum Problems New Student

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