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kolbaska11 [484]
2 years ago
6

Please help!How is constant or uniform acceleration used to explain free fall?

Physics
1 answer:
garik1379 [7]2 years ago
4 0
Free fall is a special case of motion with constant acceleration, because acceleration due to gravity is always constant and downward. For example, when a ball is thrown up in the air, the ball's velocity is initially upward.
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Answer:

<h2>C. <u>0.55 m/s towards the right</u></h2>

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Using the conservation of law of momentum which states that the sum of momentum of bodies before collision is equal to the sum of the bodies after collision.

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Momentum of 0.25kg body moving at 1.0m/s = 0.25*1 = 0.25kgm/s

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AFTER COLLISION

Momentum of 0.25kg body moving at x m/s = 0.25* x= 0.25x kgm/s

<u>x is the final velocity of the 0.25kg ball</u>

Momentum of 0.15kg body moving at 0.75m/s(body at rest) =

0.15 * 0.75kgm/s = 0.1125 kgm/s

Using the law of conservation of momentum;

0.25+0 = 0.25x + 0.1125

0.25x = 0.25-0.1125

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x = 0.1375/0.25

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Since the 0.15 kg ball moves off to the right after collision, the 0.25 kg ball will move at <u>0.55 m/s towards the right</u>

<u></u>

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