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Momentum physics
On a particle of 2 kg there is a net force of 200 NEWTONS calculate
A) the momentum developed by force in 10 seconds
B) the final speed of the particle

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Answer 1 · 2017-02-10T21:37:34

The impulse-momentum theorem states that:

"The change in momentum of an object is equal to the impulse applied to it.

This is also an equivalent statement of Newton's second law of motion.

$"Impulse"="Applied Force " Fxx"Time " Delta t$
$"Change in momentum"="Mass " mxx"Change in velocity "Deltav$

Equating the two we get
$FxxDeltat=mxxDeltav$

(A) Plugging in given values we get
$"Momentum developed "=200xx10=2000$ $"N" cdot "s"$

B) Change of speed of the particle $=2000/2=1000" m"cdot"s"^-1$
$"Final speed" ="Initial Speed"+1000" m"cdot"s"^-1$