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A spherical ball of mass 20 kg is statio...

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

A

10 m/s

B

`10 sqrt(30)m//s`

C

40 m/s

D

20 m/s

Text Solution

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The correct Answer is:
C
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