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3 years ago

11

Two identical balls collide one was initially at rest. after the collision one of the balls has a velocity of 3 m/s south. the o

ther has a velocity of 4 m/s west. what was the velocity of the ball that was moving before the collision

1 answer:

Butoxors [25]3 years ago

4 0

Two identical balls collide<span> head on. The </span>initial velocity<span> of </span>one<span> is 0.75 </span>m/s<span> east, while that of the </span>other one<span> is 0.43 </span>m/s west<span>.</span>

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Answer:

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Explanation:

It is given that,

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Vertical distance, d = 3.1 m

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Using the work energy theorem, the loss of kinetic energy is equal to the sum of gain in potential energy and the work done against friction.

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$W=\mu mg\ cos\theta\times \dfrac{d}{sin\theta}$

$W=\dfrac{\mu mgh}{tan\theta}$

$\dfrac{1}{2}mv^2=mgh+\dfrac{\mu mgh}{tan\theta}$

$\dfrac{1}{2}v^2=gh+\dfrac{\mu gh}{tan\theta}$

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Answer:

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