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Contact [7]
3 years ago
12

Help Please! Been stuck for some time

Physics
1 answer:
Naya [18.7K]3 years ago
6 0

Answer:

pretty sure A is correct, as they are pushing in opposite directions, hence canceling each other

Explanation:

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A ball with a mass of 2.89 kg bounces off of the ground. Just before it hits the ground, its velocity is 6.00 m/s in the downwar
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Answer:

30.46 kgm/s

Explanation:

According to conservation law of momentum, the magnitude of the impulse J that the ground gave the ball equals to the change in momentum of the ball before and after it hits the ground.

Before the hit, the ball velocity is 6m/s, so its momentum is 6 * 2.89 = 17.34 kgm/s

After the hit, the ball velocity is -4.54 m/s in the opposite direction, so its momentum is 2.89*(-4.54) = -13.12 kgm/s

So the change of momentum, and also the impulse is

17.34 - (-13.12) = 30.46 kgm/s

3 0
3 years ago
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The mechanical energy of a 2kg body is 35J and its potential energy is 10J calculate speed energy​
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