First slide

Physical quantities and units

Question

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

Easy

A

Increased 4 times
B

Increased 8 times
C

Increased 16 times
D

Decreased 16 times

Solution

Energy = force $\times$ distance, so if both are increased by 4 times, then energy will increase by 16 times.

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