Impulse and Momentum
Problenl
A 1.5kg ball dropsvertically onto a floor, hitting the floor with a speedof 25 m/s. It is in
contactwith the floor for 0.020s andthenreboundsto a height of 11.5m. What is the
magdtudeofthe averageforce ofthe floor on the ball?
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Problen 2
Two cratesaresliding on a frictionlesssurfaceasshownin the figure below. The 10kg
crateis sliding to the right at 8.0 m/s andthe 25 kg crateis sliding to the left at 5.0 m/s.
The two cratescollide andstick together.Useconservationof momentumto find the
velocity of the two cratesafter the collision.
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