it rolls down a smooth surface to the ground

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A spherical ball of mass 20kg is stationary at the top of a hill of height 100m , it rolls down a smooth surface to the ground , then climbs up another bill of height of 30m and final rolls down to a horizontal base at a height of 20m about the ground . The velocity attained by the ball is
27
Oct
A spherical ball of mass 20kg is stationary at the top of a hill of height 100m , it rolls down a smooth surface to the ground , then climbs up another bill of height of 30m and final rolls down to a horizontal base at a height of 20m about the ground . The [...]
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Tags: A spherical ball of mass 20kg is stationary at the top of a hill of height 100m , it rolls down a smooth surface to the ground , then climbs up another bill of height of 30m and final rolls down to a horizontal base at a height of 20m about the ground . The velocity attained by the ball is ,