1.

(i) Explain by an example of what is meant by potential energy. Write down the expression for the gravitational potential energy of a body of mass 'm' placed at a height 'h' above the surface of the earth.(ii) What is the difference between potential energy and kinetic energy?​(iii) A ball of mass 0.5 kg slows down from a speed of 5 m/s to that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.

Answer» (i) Explain by an example of what is meant by potential energy. Write down the expression for the gravitational potential energy of a body of mass 'm' placed at a height 'h' above the surface of the earth.

(ii) What is the difference between potential energy and kinetic energy?

​(iii) A ball of mass 0.5 kg slows down from a speed of 5 m/s to that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.


Discussion

No Comment Found