Chapter 8 Work Power and Energy - Test 1

1. If a man is sitting on a chair and writing something on papers he is doing work

1) False
2) True
2. The body covers some distance under the action of a force

1) False
2) True
3. Cos Oo = 1

1) False
2) True
4. We do some work when we lift a load from the Earth to some heights

1) False
2) True
5. One kilo Joule is equal to 106 Joule

1) True
2) False
6. Joule is a bigger unit of work

1) False
2) True
7. Power of bigger motor is greater than the smaller motor

1) False
2) True
8. 10 6 watt refers to megawatt

1) False
2) True
9. We spend energy to provide any facility

1) True
2) False
10. Energy is a vector quantity

1) True
2) False
11. A metallic ball lying on the surface of earth has P.E equal to zero

1) False
2) True
12. Power = work/ time

1) True
2) False
13. Joule is the unit of power

1) False
2) True
14. The ability of body to do work is called kinetic energy

1) False
2) True
15. Weight of the ball =Force

1) False
2) True
16. Total Energy = K.E + P.E

1) False
2) True
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