1. If the force of 6N displaces an object 2m in the direction of force, then work done will be ___________.




... Answer is (b) 12 Joule
Work W = F.d


2. If a body of mass 1 kg is moving with a velocity of 1 m/sec then the K.E of the body will be __________.




... Answer is (c) 0.5 Joules
K.E. = 1/2 m v²


3. If a machine performs 20 J of work in 10 sec then its power is _____________.




... Answer is (c) 2 watt
P = W/t


4. A body of mass 1kg is lifted through a height of 1m. The energy possessed in the body will be____________. (consider g=10 m s⁻²)




... Answer is (b) 10 Joule
P.E. = mgh


5. The energy released during fission or fusion reaction is called _______________.




... Answer is (d) Nuclear energy
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6. Which is the renewable source of energy




... Answer is (a) Solar and wind
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7. The ratio of output to input is called :




... Answer is (d) Efficiency
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8. Work done per unit of time is called _____________.




... Answer is (c) Power
P = W/t


9. Coal, gas, and oil are all examples of ____________.




... Answer is (c) Fossil fuel energy
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10. ______________ is not a renewable source of energy.




... Answer is (b) Coal
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