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Newton's Laws for System of Particles

A man throws ...

Question

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?

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Solution

$1.$ Initial momentum is $m u = 0.5 K g \times 10 m / s = 5 K g - m / s$
$2.$ At highest point its velocity becomes $z e r o$ so momentum will slo be $z e r o$ as momentum $p = m a s s \times v e l o c i t y .$

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