Categories > Work, Energy and Power > WEP > A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It slides down a smooth surface to the ground, then climbs up another hill of height 30 m and finally slides down to a horizontal base at a height of 20 m above the ground. The velocity attained by the ball is

Work, Energy and Power

Question: A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It slides down a smooth surface to the ground, then climbs up another hill of height 30 m and finally slides down to a horizontal base at a height of 20 m above the ground. The velocity attained by the ball is


1) 10 m/s
2) $10\sqrt {30}$m/s
3) 40 m/s
4) 20 m/s
Solution: Explanation: No Explanation
WEP Conservation of Energy and Momentum

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