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Homework Statement
Calculate the change in momentum of a 120g pool ball hitting at 9m/s and rebounding at 6m/s. It rebounds at an equal and opposite angle of 45 degrees.
Pi = 9m/s
Pf = 6m/s
angle = 45 degrees
Homework Equations
The Attempt at a Solution
I have done all my calcs in the picture below which shows a diagram
I have concluded that the impluse was 10.8166 N, somehow I don't think I have done this right
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