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If the unit of force is 1N, the unit of work done is 20 J and the unit of time is 1 second, the unit of mass is

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0.05Kg

1Kg

10Kg

100Kg

answer is C.

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Detailed Solution

$W = F . L$

$20 J = (1 N) L$

$20 N m = (1 N) L$

$L = 20 m$

$F = [M L T^{- 2}]$

$1 N = M (20 m) {(1 s)}^{- 2}$

$1 K g m s^{- 2} = M (20 m) {(1 s)}^{- 2}$

$M = \frac{1}{20} = 0.05 K g$

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