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posted by Anonymous on Friday, October 5, 2012 at 3:45pm.
Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact
m•v=F•t F=m•v/t=90•8.6/0.2=3870 N
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