A man throws a ball weighing 500 g vertically upwards with a speed of 10 m/s.
(i) What will be its initial momentum?
(ii) What would be its momentum at the highest point of its flight?

(i).  Mass of the ball $m=500\ g=0.5\ kg$

Initial velocity of the ball $v_1=10\ m/s$

therefore, initial momentum $P_1=mv_1$

$=0.5\ kg\times10\ m/s$

$=5\ kg-m/s$

Therefore, the initial momentum of the ball is $5\ kg-m/s$.

(ii). At the highest point, its velocity will be zero.

$v_2=0$

So the momentum of the ball at its highest point $P_2=mv_2=0$

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Updated on: 10-Oct-2022

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