Work and Energy | Quiz | Class IX
MCQs
1. Which of the following is an example of work done against force?
2 points
2. What happens to its potential energy when an object is taken to high altitude?
2 points
3. What is the unit of energy in c.g.s system?
2 points
4. Anna carries a 12 kg bag upstairs to a height of 15 steps. amount of work she has done is
2 points
5. Power of pump when it can lift 70 kg of water through 16 m in 10 s is
2 points
6. Energy coming from sun for last billion of years is result of a
2 points
7. During interconversion of energy from one form to other forms, total energy at any time remains
2 points
8. The spring will have maximum potential energy when
2 points
9. The work done is 0 if
2 points
10. A students caries a bag weighing 5 kg from the ground floor to his class on the first floor that is 2 m high. The work done by the boy is
2 points
11. How much time will be required to perform 520 J of work at the rate of 20 W?
2 points
12. When a body falls from a height, its total mechanical energy remain same. The statement is –
2 points
13. If the velocity of a body is doubled its kinetic energy
2 points
14. A ball is dropped from a height of 10 m.
2 points
15. The gravitational potential energy of an object is due to
2 points
16. Energy possessed by a body due to its position is called its
2 points
17. When a force acting on a body displaces it in direction of a force then
2 points
18. Energy stored in a coal is
2 points
19. Plant or animal wastes that can be burnt as fuel is called
2 points
20. If a pump can lift 200 kg of water through a height of 6 m in 10 seconds, then its power is
2 points