30) What is the work done, if a force of 250 newtons acted upon a body and the body has been moved through a distance of 15 metres?

31) What is the potential energy, if a body of mass 250 kg is at a height of 30 metre?

32) What is the potential energy in a body of mass 10 kg kept on the top of a pole 20 metres height?

33) What is the work done in joules if a load of 15.5 kg is lifted through a height of 4.4 metres?

34) What is the kinetic energy of a bullet of mass 5gm travels with a speed of 500 m/sec?