# Circular motioni, work question.

• Miike012
In summary, the conversation is discussing the forces that are doing work on a ball tied to a string and being swung in a circle at a constant velocity. The question is asking for clarification on the scenario and the person providing the question suggests defining the problem further, such as whether it is in a gravitational field or in space, and what is causing the ball to swing.
Miike012
Senario: A string is tied to a ball and swung in a circle at constant velocity.

My question was... which forces are doing work?

Miike012 said:
Senario: A string is tied to a ball and swung in a circle at constant velocity.

My question was... which forces are doing work?

with 500+ posts, you should know that you need to give us your thoughts before we can be of much help.

You should also define the problem better... are you talking about in a gravitational field like on the Earth? Or in space? What is "swinging" the ball?

this was a problem I just made up, so ill say a person is swinging a ball.

## 1. What is circular motion and how does it work?

Circular motion is the movement of an object along a circular path. It occurs when an object experiences a force that continuously pulls it towards the center of the path, known as centripetal force. This force is necessary to keep the object moving in a circular path, as without it, the object would continue in a straight line due to its inertia.

## 2. What is the difference between uniform and non-uniform circular motion?

Uniform circular motion is when an object moves along a circular path at a constant speed, meaning it covers equal distances in equal amounts of time. Non-uniform circular motion, on the other hand, is when an object moves along a circular path at varying speeds, meaning it covers unequal distances in equal amounts of time.

## 3. How is circular motion related to centripetal force?

Centripetal force is the force that keeps an object moving in a circular path. It is always directed towards the center of the circle and its magnitude is directly proportional to the mass of the object, the square of its velocity, and inversely proportional to the radius of the circular path. In other words, the greater the centripetal force, the faster the object will move in the circular path.

## 4. What is the work done in circular motion?

The work done in circular motion is the product of the force applied to the object and the distance it moves in the direction of the force. In the case of circular motion, the force applied is the centripetal force and the distance moved is the circumference of the circular path. Therefore, the work done in circular motion is equal to the centripetal force multiplied by the circumference of the circle.

## 5. How can circular motion be applied in real-life situations?

Circular motion can be observed in many real-life situations, such as the motion of planets around the sun, the rotation of a car's tires, the swinging of a pendulum, and the spinning of a roller coaster. It is also used in various machines and devices, such as centrifuges, washing machines, and amusement park rides. In these applications, circular motion is used to create centrifugal force, which can be used for various purposes, such as separating substances or creating a thrilling ride.

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