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1.Units, Dimensions and Measurement
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A body of mass $m = 3.513\ kg$ is moving along the $x-$axis with a speed of $ 5.00\ ms^{-1}$. The magnitude of its momentum is recorded as ........ $kgm/s$
A
$17.6 $
B
$17.565$
C
$17.56$
D
$17.57$
Solution
Momentum $P = m \times v$
$ = \left( {3.513} \right) \times \left( {5.00} \right) = 17.565\,kg\,{\rm{m/s}}$
$ = 17.6$ (Rounding off to get three significant figures )
Standard 11
Physics
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