A cannon ball of mass $2 k g$ is fired at a target $500 m$ away. The $400 k g$ cannon recoils with a velocity of $2 m s^{- 1}$ . Assuming cannon ball moves with constant velocity, when will it hit the target?

Q. If a ship travels from one port to another with the average speed of

36 k m h^{- 1}

, find its speed in

m s^{- 1}

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A cannon ball of mass 500g is fired with a speed of 15ms−1. Find its momentum.

The correct option is C 7.5kg m s−1P=m×vGiven m = 500 gram which is also 0.5 Kg after conversion(500/1000=0.5kg); v=15 m/secP=0.5×15=7.5kgm/secHence momentum is equal to 7.5kg m/sec.

A cannon ball of mass $500 g$ is fired with a speed of $15 m s^{- 1}$ . Find its momentum.

The correct option is C $7.5 k g$ $m$ $s^{- 1}$
$P = m \times v$

Given m = 500 gram which is also 0.5 Kg after conversion $(500 / 1000 = 0.5 k g); v = 15 m / s e c$

$P = 0.5 \times 15 = 7.5 k g m / s e c$

Hence momentum is equal to $7.5 k g m / s e c$ .