3 years ago

Which is the fundmental law of energy?

Physics

1 answer:

Vlad1618 [11]3 years ago

3 0

Energy can be transferred but cannot be destroyed.

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A tennis ball (m=0.060 kg) is moving horizontally at 20 m/s toward a tennis player who hits it straight back at 26 m/s. What is

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Answer:

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Explanation:

Given that,

Mass of a ball, m = 0.06 kg

Initial velocity of the ball, u = 20 m/s

Final velocity of the ball, v = 26 m/s

We need to find the change in momentum of the tennis ball. It is equal to the final momentum minus initial momentum

$\Delta p=m(v-u)\\\\=0.06\times (26-20)\\\\=0.36\ kg-m/s$

So, the change in momentum of the ball is 0.36 kg-m/s.

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Which is the fundmental law of energy?​

Which is the fundmental law of energy?