Q31 of 146 Page 163

Explain the transformation of energy in the following cases:

(i) A ball thrown upwards.


(ii) A stone dropped from the roof of a building.

(i) When a ball thrown up all of its kinetic energy is converted into potential energy at the top point.

(ii) When a stone is drop from certain height all of its potential energy at that height is converted into kinetic energy just above the ground.


More from this chapter

All 146 →
30

A car weight 20000 N climbs up a hill at a steady speed of 8 m/s, gaining a height of 120 m in 100 s. Calculate:

(a) Work done by the car.


(b) Power of engine of car.

 31

What do you understand by the term “transformation of energy”? Explain with an example.

 32

State and explain the law of conservation of energy with an example.

 32

Explain how, the total energy a swinging pendulum at any instant of time remains conserved. Illustrate your answer with the help of a labeled diagram.