A school bag of mass is placed on the top shelf of a cupboard above the floor
PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy
Problem
A school bag of mass 2.5kg is placed on the top shelf of a cupboard 1.6m above the floor.
(i) Calculate the gravitational potential energy of the bag with respect to the floor. Take g=9.8ms−2.
(ii) The owner wants the same bag to possess 100J more gravitational potential energy than the value obtained in part (i). Find the height above the floor at which the bag should now be placed.
(iii) Another bag of mass 3.0kg is placed at the height found in part (ii). Compare its gravitational potential energy with that of the first bag by finding the ratio of the two energies.