A worker takes 15kg object and put the object 1 meter above on his head from the surface of earth. Then work done by the worker is- (g = 10 ms^-2).

Which of the following can do more work?

A. A raised hammer

B. A bullet fired by the gun

C. A moving stone

D. A rotating wheel

Mechanical energy is?

A. Energy released by a moving object

B. Energy emitted during mechanical work

C. The sum of the kinetic energy and potential energy of an object

D. Equal to the rate of work done

Work present if there is-

A. Force

B. Energy

C. Friction

D. Power

A compressed spring possesses more energy than a spring of normal length because the compressed spring has-

A. Chemical energy

B. Potential energy

C. Kinetic energy

D. Heat energy