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Force Motion and Energy


7. 

When the mass and velocity are doubled the kinetic energy will

Answer : D. increase 8 times

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8. 

A small drop of mercury is spherical due to

Answer : B. surface tension

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9. 

The relation amongst velocity(V), frequency (n) and wavelength(lamda) is

Answer : C. V=n lamda

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10. 

what kind of energy works when a watch spring is wound up?

Answer : B. Potential energy

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11. 

Which one of the following is a vector quantity?

Answer : A. Momentum

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12. 

Sound energy is converted into electrical energy(audio signal) by a

Answer : A. Microphone

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