A block of 2 kg slides on a parallel surface at a speed of 4 m/s. It falls on an uncompress spring and presses it until the block becomes completely motionless. The value of kinetic friction is 15N and the spring constant is 10000N/m. spring presses-

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