A body of mass 1000 kg is moving horizontally with a velocity 6 m s - 1 . If 200 kg extra mass is added, the final velocity (in m s - 1 ) is:

Question

TestHub · Accepted Answer

From the conservation of linear momentum, it can be written that

$M u = (M + m) v . . . (1)$

where, $M$ is the initial mass, $u$ is the initial velocity, $m$ is the extra mass added and $v$ is the final velocity of the composition.

From equation (1), it follows that

$1000 \times 6 = 1200 \times v \Rightarrow v = 5 m s^{- 1}$

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