Velocity of an object Rotating in vacuum , Gravity applies

In summary, It is not clear what tension you are talking about. If the ball is tied to anything, the friction in the rope or the friction between the rope and what it's tied to is eventually going to bring the motion of the ball to a stop. If the ball is not tied to anything, the motion of the ball is still affected by the gravity of the earth. It is not clear what effect the vacuum would have on the problem.
  • #1
SeeKeeDeeDoo
3
0
I was wondering what might happen If we for instant, Rotated a ball around an axis in a vacuum chamber.
First, If the initial speed was 20m/s would it remain like that forever, hypotheticaly saying No friction exists and that Air Resistance does not exist as the Ball rotates in vacuum.

Also Will centripital force cancel out gravity if the speed is high enough to produce 9.81m/s2 Acceleration?

Also Will Tension Affect Speed ?
 
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  • #2
An object in a vacuum chamber on Earth is still affected by gravity. Unless you levitated the ball in the vacuum chamber so that its surface did not touch anything, eventually friction would retard the spin of the ball.

A spinning ball is still affected by gravity, whether or not it's in a vacuum chamber. Remember, gravity attracts an object toward the center of the earth.

It's not clear what tension you are talking about.
 
  • #3
SteamKing said:
An object in a vacuum chamber on Earth is still affected by gravity. Unless you levitated the ball in the vacuum chamber so that its surface did not touch anything, eventually friction would retard the spin of the ball.

A spinning ball is still affected by gravity, whether or not it's in a vacuum chamber. Remember, gravity attracts an object toward the center of the earth.

It's not clear what tension you are talking about.
I haven't totally understood your answer.
To be more simple, would the ball "Which is tied to a rope and the other end of the rope is tied to a pole" projected at 20 m/s Maintain its speed in vacuum **assuming No friction exists, Only gravity exists**

The tension in the rope.
 
  • #4
If the ball is tied to anything, the friction in the rope or the friction between the rope and what it's tied to is eventually going to bring the motion of the ball to a stop. The presence of a vacuum is not, by itself, going to eliminate friction between objects in contact with one another.
 
  • #5
SeeKeeDeeDoo said:
I haven't totally understood your answer.
To be more simple, would the ball "Which is tied to a rope and the other end of the rope is tied to a pole" projected at 20 m/s Maintain its speed in vacuum **assuming No friction exists, Only gravity exists**

The tension in the rope.
If you assume that friction does not exist anyway, what is the point of the vacuum?
What do you think will the vacuum change in the problem, as compared with the situation in air?
 

1. What is the velocity of an object rotating in a vacuum?

The velocity of an object rotating in a vacuum is determined by its angular velocity, which is the rate at which it rotates around its axis, and its radius, which is the distance from its axis to any point on its surface. It can be calculated using the formula v = ωr, where v is the velocity, ω is the angular velocity, and r is the radius.

2. Does the velocity of a rotating object change in a vacuum?

In a vacuum, the velocity of a rotating object remains constant, as there is no air resistance or external forces acting on the object to slow it down or speed it up. However, the angular velocity may change if there is a change in the radius or mass distribution of the object.

3. How does gravity affect the velocity of a rotating object in a vacuum?

Gravity has no direct effect on the velocity of a rotating object in a vacuum. However, it does play a role in determining the object's angular velocity and trajectory. The force of gravity creates a centripetal acceleration that keeps the object in its circular path, and this acceleration is related to the object's velocity and radius.

4. Can the velocity of a rotating object in a vacuum be greater than the speed of light?

No, according to the theory of relativity, the speed of light is the maximum speed at which any object can travel. Therefore, the velocity of a rotating object in a vacuum cannot exceed the speed of light, as it would violate this fundamental principle of physics.

5. How is the velocity of a rotating object in a vacuum affected by its mass?

The velocity of a rotating object in a vacuum is not directly affected by its mass. However, the object's mass does play a role in determining its angular momentum, which is the product of its mass, velocity, and radius. An object with a larger mass will have a greater angular momentum, which affects its stability and ability to maintain its rotation.

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