Work, Energy an...

A body of a mass 10 kg falls from a building 400 m height. What is the difference between the energy possessed by the body at any instance and initial energy?

Find the kinetic energy of a car having mass 1000 kg and is moving with a speed of 40 m/s.

What should be the speed of athlete who has total weight of 300 N so that he gets 450 J of kinetic energy? Take g = 10 m/s²

For the same kinetic energy of a body, what should be the change in its mass if its velocity is tripled?

Calculate the momentum of the body having kinetic energy equal to 2 kJ and mass equal to 100 gram.

What is the potential energy of a spring which is being compressed by a external body having mass 100g? It is known that on the removal of external body, spring moves with a speed of 1ms^1.

Power cannot be measure in

At which point(s) potential energy of the simple pendulum is maximum?

What type of energy conversion takes place in electric cell?

What kind of energy conversion takes place in photoelectric cell?

Which of the following is used to change heat energy into electrical energy?

Which of the following is true about simple pendulum?

What will be the K. E of the body if it is moving with 30 m/s?

It is known that same body has K. E equal to 40 J when moving at 10 m/s.