A spherical ball of mass … … is stationary at the top of a hill of height … …. It rolls down a smooth surface to the ground, then climbs up another hill of height … … and finally rolls down to a horizontal base at a height of … … above the ground. The velocity attained by the ball is

Option B. Loss in potential energy … gain in kinetic energy

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Work Power and Energy

JEE Main 2005 · Annual, Paper 1 · Q8565

PhysicsMedium70×since 2002Q8565

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