Rotational MotionEasy
Question
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. The velocity attained by the ball is
Options
A.40 m/s
B.20 m/s
C.10 m/s
D.10 √30 m/s
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