First slide

Physical quantities and units

Question

A watt is

Easy

A

$kgm / s^{2}$
B

${kgm}^{2} / s^{3}$
C

$kgm / s$
D

${kgm}^{2} / s^{2}$

Solution

$Watt = \frac{J}{\sec} = \frac{N - m}{\sec} = kg \frac{m^{2}}{\sec^{3}}$

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