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A 0.38 kg playground ball with a 12.0 cm radius rolls without slipping down a pool...

A 0.38 kg playground ball with a 12.0 cm radius rolls without slipping down a pool slide from a vertical distance h1= 2.2 m above the bottom of the slide and then falls an additional h2= 0.40 m vertical distance into the water. What will be the magnitude of the ball's translational velocity when it hits the water? Since the ball is air-filled, assume it approximates a hollow, thin spherical shell. Also, assume that its rate of rotation remains constant from the time it leaves the bottom of the slide until it strikes the water. Answer in m/s.

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