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  4. A body of mass, m=3.513kg is moving along the X -axis with a speed of 5.00ms- 1 . The magnitude of its momentum is best recorded as,

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Q. A body of mass, $m=3.513kg$ is moving along the $X$ -axis with a speed of $5.00ms^{- 1}$ . The magnitude of its momentum is best recorded as,

NTA AbhyasNTA Abhyas 2022

Solution:

The formula of linear momentum in terms of mass and linear velocity,
$p=mv=3.513\times 5.00=17.565kgms^{- 1}$
$=17.6kgms^{- 1}$
(after rounding off to $3$ significant figures as in data with the least number of significant figures).