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Hitman42 [59]
4 years ago
6

What is the centripetal force that holds planets in orbit?

Physics
1 answer:
Fudgin [204]4 years ago
8 0
<h2>Answer: Gravity force</h2>

If we approximate the orbit of the planets around the Sun to circular orbits with a uniform circular motion, where the velocity \vec{V} is a vector, whose direction is perpendicular to the radius r of the trajectory; the acceleration \vec{a} is directed towards the center of the circumference (that's why it's called centripetal acceleration).  

Now, according to Newton's 2nd law, the force \vec{F} is directly proportional and in the same direction as the acceleration:  

\vec{F}=m.\vec{a}  

Therefore the net force resulting from the movement of a planet orbiting the Sun points towards the center of the circle, this is called Centripetal Force which is a central force that in this case is equal to the gravity force.

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1 year ago
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4 years ago
What is the speed of a wave with a wavelength of 2 m and a frequency of 9 Hz?
ale4655 [162]

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7 0
3 years ago
At rest, a car’s horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street. A bicyclist movin
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Answer:

(a): The cyclist is behind the car.

(b): The speed of the car are Vf= 31.97 m/s.

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