1.Units, Dimensions and Measurement
normal

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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