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    Calculating Deceleration and Force of Impact: Skateboarding Physics Homework

    Homework Statement Leroy, who has a mass of 100kg, is skateboarding at 9.0 m/s when he smacks into a brick wall and comes to a dead stop in .2s a. Show that his deceleration is 45 m/s^2. b. Show that the force of impact is 4500N. Homework Equations I think the only equations that...