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leonid [27]
3 years ago
15

The moon Phobos orbits Mars

Physics
1 answer:
solmaris [256]3 years ago
4 0

Answer:

The moon Phobos orbits Mars (m = 6.42 x 1023 kg) at a distance of 9.38 x 106 m.

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You are testing a new amusement park roller coaster with an empty car with a mass 120 kg. One part of the track is a vertical lo
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Answer:

- 5436 J

Explanation:

mass of car, m = 120 kg

radius of loop, r = 12 m

velocity at the bottom (A) = Va = 25 m/s

Velocity at the top(B) = Vb = 8 m/s

Vertical distance from A to B = diameter of loop, h = 2 x 12 = 24 m

by use of Work energy theorem

Work done by all the forces = change in kinetic energy of the body

Work done by the force + Work done by the friction = Kinetic energy at B - kinetic energy at A

- m x g x h + Work done by friction = 0.5 x 120 x (Vb^2 - Va^2)

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In order that a train stop safely it'll always pass a signal showing yellow light
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Answer:

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