First slide

Physical quantities and units

Question

If the units of M and L are increased three times, then the unit of energy will be increased by

Moderate

A

3 times
B

6 times
C

27 times
D

81 times

Solution

$[E n e r g y] = [M L^{2} T^{- 2}] .$
Increasing M and L by a factor of 3, energy is increased 27 times.

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