Circular Motion,Uniform motion in Vertical Circles

In summary, circular motion is the movement of an object along a circular path with a constant speed and changing direction. Uniform motion in vertical circles refers to the constant speed of an object moving in a vertical circular path. Centripetal force is the force that keeps an object in a circular path, while centrifugal force is an apparent force caused by the object's inertia. In uniform motion in vertical circles, the centripetal force is greater than the centrifugal force, allowing the object to maintain its circular motion.
  • #1
Lydia22
34
0

Homework Statement



If the object is at the top, the centripetal force (pointing as
always towards the centre) is down and negative.
● If the object is at the bottom, the centripetal force is pointing up and positive

The Attempt at a Solution


I thought any force towards the center is always positive.Am i wrong?
 
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  • #2
Depends on your coordinate system?
 
  • #3
It's called a sign convention. You may choose it to be whatever you wish but you must be consistent within each problem.
 

1. What is circular motion?

Circular motion is the movement of an object along a circular path, where the distance from the center of the circle remains constant. This type of motion is characterized by a constant speed and a changing direction, as the object continuously moves around the circle.

2. What is uniform motion in vertical circles?

Uniform motion in vertical circles refers to the motion of an object moving in a circular path in a vertical plane, where the speed remains constant throughout the motion. This type of motion is commonly seen in rides at amusement parks, such as a Ferris wheel or a roller coaster loop.

3. What is centripetal force?

Centripetal force is the force that keeps an object moving in a circular path. It acts towards the center of the circle and is necessary to maintain the object's direction of motion. In the case of uniform motion in vertical circles, the centripetal force is provided by the tension in the string or track that the object is moving along.

4. How is centripetal force related to circular motion?

Centripetal force is directly related to circular motion, as it is the force that keeps an object moving in a circular path. It is necessary for the object to continuously change direction and maintain its circular motion. The greater the speed or mass of the object, the greater the centripetal force required to keep it in its circular path.

5. What is the difference between centripetal force and centrifugal force?

Centripetal force is the force that keeps an object moving in a circular path, while centrifugal force is the outward force that seems to act on the object as it moves in a circular path. However, centrifugal force is not a real force, but rather an apparent force caused by the object's inertia. In uniform motion in vertical circles, the centripetal force is greater than the apparent centrifugal force, keeping the object in its circular path.

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