A sack of rice of mass is lifted to a height above the floor

PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy

Problem

A sack of rice of mass

M

is lifted to a height

h

above the floor. (i) If the mass is doubled while the height remains

h

, how does its gravitational potential energy change? (ii) If the height is reduced to

\tfrac{h}{2}

while the mass remains

M

, how does its gravitational potential energy change? Give a brief reason for each case.