Physics

Which one of the following is not measured in the units of energy?


ANSWER

Impulse$$\times$$Time


SOLUTION
Energy $$= M^{1} L^{2} T^{-2}$$

Couple $$\times$$  (angle turned through) $$=\vec{r} \times \vec{f}\times \theta  = (L^{1})  (M^{1} L^{1} T^{-2})  (M^{0} L^{0} T^{0})=M^{1} L^{2} T^{-2}$$

(Moment of Inertia) $$\times$$  (Angular velocity$$)^{2}= (MR^{2}) \times (\omega ^{2}) = (M^{1}) (L^{2})(T^{-2})= M^{1} L^{2} T^{-2}$$

Force $$\times$$ distance $$ = M^{1} L^{1} T^{-2} \times  L^{1} = M  L^{2} T^{-2}$$

Impulse $$\times$$ time $$= (f\times t) \times t = M^{1} L^{1} T^{-2} \times T \times T=M^{1} L^{1}  \rightarrow $$ not a unit of energy
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Single Correct Medium Published on 18th 08, 2020
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