Chapter 2 - Force and Motion I (g) A rubber ball is released from a height, H. The ball
drops vertically downwards and upon hitting the
floor, bounces back a height, h (h<H). If the
velocity of downward motion is negative, sketch the
velocity-time graph for the motion of the rubber
ball.

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Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.