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pochemuha
3 years ago
9

What evidence do scientists have that earth has been hit by large objects like asteroids in the past

Physics
1 answer:
Fantom [35]3 years ago
3 0

CRATERS AND METEORITES

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A 20-Kg child is on a swing attached to 3.0 m-long chains. The child swings back and forth, swinging out to a 60-degree angle. (
kvv77 [185]

Answer:

 v = 29.4 m / s

Explanation:

For this exercise we can use the conservation of mechanical energy

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final point. Higher

          Em_{f} = U = m g h

Let's use trigonometry to lock her up

          cos 60 = y / L

          y = L cos 60

Height is the initial length minus the length at the maximum angle

           h = L - L cos 60

           h = L (1- cos 60)

energy is conserved

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          ½ m v² = mgL (1 - cos 60)

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let's calculate

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          v = 29.4 m / s

6 0
3 years ago
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