Q.

If the unit of force and length each be increased by four times, then the unit of energy is increased by

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a

16 times

b

8 times

c

2 times

d

4 times

answer is A.

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Detailed Solution

Work = Force ×  Displacement (length)

If unit of force and length be increased by four times then the unit of energy will increase by 16 times. Energy is velocity squared, thus length squared

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