When a body falls freely towards the earth, then its total energy

A car is accelerated on a labeled road and attains a velocity 8 times of its initial velocity. In this process the potential energy of the car

In case of negative work the angle between the force and displacement is

An iron sphere of mass 11 kg has the same diameter as an aluminum sphere of mass is 35 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same

A girl is carrying a school bag of 5 kg mass on her back and moves 300 m on a levelled road. The work done against the gravitational force will be (g =10 m s^–2)