Download presentation

Presentation is loading. Please wait.

1
**Uniform circular motion: examples include**

Objects in orbit (earth around the sun Driving a car around a corner Rotating a ball around on a string

2
Circular Motion According to Newton’s mechanics, objects don’t tend to move in a circle by themselves. They tend to either be at rest of move in a straight line at constant speed (this is Newton’s first law)

3
**Circular Motion Circular motion is not “natural” motion**

Some (a Force) must make an object move in a circle The Force causing circular motion can be one of many different forces, depends on the situation (orbit = gravitational force, car turning a corner = frictional force, ball on a string = tension force)

4
Circular Motion Remember from Newton’s 2nd law, that …..Force = mass x acceleration (F = ma) But if the object is in uniform circular motion, their speed is constant, so is acceleration = 0?

5
Circular Motion In circular motion, the acceleration is a change in the direction of the object, even though the speed is constant, the direction keeps changing, and velocity is a vector. The force keeps pulling the object to the center, hence we call this type of acceleration “centripetal” acceleration which means “center seeking”.

6
Circular Motion Solving circular motion problems is like a typical “force” problem where the motion is circular rather than linear. F = ma still works, now we have a new term for centripetal acceleration ac = v2/r acceleration (centripetal) = velocity squared/radius.

Similar presentations

Presentation is loading. Please wait....

OK

Circular and Centripetal Motion

Circular and Centripetal Motion

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google