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chocolatelover
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Homework Statement
A 45.0 g Super Ball traveling at 30.0 m/s bounces off a brick wall and rebounds at 21m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.0ms, what is the magnitude of the average acceleration of the ball during this time interval? (It should be positive)
Homework Equations
1ms=10^-3s
average acceleration=final velocity-initial velocity/time interval
The Attempt at a Solution
21-30/3-0=-3ms
1ms(10^-3s/-3ms)=-.00033
but this can't be right because it's negative, right?
Thank you very much
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