1. Circular Motion

2. Tangential Speed
Tangential Speed is the linear speed of an object undergoing circular motion
Direction of velocity: Right A D C B
Direction of velocity: Up
Direction of velocity: Left
Direction of velocity: Down

3. Centripetal Acceleration and Force
Centripetal acceleration and force always point toward the center of the circle

4. Newton’s Universal Law of Gravitation
Gravity is everywhere!
r is the distance between
the two objects. Don’t
divide it in half!

5. Examples of Circular Motion
Force on a revolving ball (p. 117). Estimate the force that a person must exert on a string attached to a kg ball to make the ball revolve in a horizontal circle of radius m. The ball makes 2.00 rev/sec
Find v first. V=(2πr)/T= 7.54 m/s
F=mv

6. Calculating g
To calculate g at the surface of the earth we would use the equation below and plug in the values for G, Mass of the Earth and Radius of the earth.
If we want to know g at some height above the earth’s surface, add the height to the radius of the earth