A 25-G Ball Is Released from Rest 80 M Above

question 18

Multiple Choice

A 25-g ball is released from rest 80 m above the surface of the Earth.During the fall the total thermal energy of the ball and air increases by15 J.Just before it hits the surface its speed is

• A)19 m/s
• B)35 m/s
• C)40 m/s
• D)45 m/s
• E)53 m/s

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