"Not everything that counts
can be counted, and not everything
that can be counted, counts."

- Einstein

 

 

 I. Uniform Circular Motion

 

Why can it be said that the earth
has a nearly uniform circular motion
around the sun?

The earth moves in a plane around the sun.
Define the geometric shape called a plane.

 

 

The earth and a motorcycle need something
in order to turn. What is that?

Y2K Ducati Women's Motorcycle Team

 

 

 

 

 

 

"What does this picture

tell you about the

speed of these

motorcyclists?"

Nina Prinz and Letizia Marchetti
- Ducati Women's Motorcycle Racing Team

http://www.webbikeworld.com/

 

"A large centripetal

(center directed)

force in needed to turn

at high speeds."

 

 

 

 

 

 

[ Flash ]

St. Mary's H.S. Physics

 

 

 

 

Skater

[ HTML5 ]
Rutgers U.

 

 

St. Mary's Physics YouTube Channel

School blocks YouTube? Download file below

VelocityObjectMovingCircle.mp4

 

 

 

 

[ Flash ]

 

 

 

 

 

 

 

 

 

 

circMotion

 

 

 

 

Centripetal Velocity

Science Joy Wagon

 

 


In order for an object to move at constant speed in a circle, an outside force must constantly turn the object toward the
center of circular path.

 

 

Circular Motion, Car on a Banked Track

by Dr. Michael R. Gallis mrg3@psu.edu

Penn State Schuylkill

Go Nittany Lions!!

 

 

 

Draw the centripetal force,
and tangential velocity

 




 

 

Draw the centripetal force,
and tangential velocity

 

 












 



 

Draw the centripetal force, and tangential velocity






 

 

 

 

Where should you

release the ball to hit

the target? 

 

 

 

 

 

 

| Flash |

 

 

 

 

 

 

B

 

 

 

 

At point P, the car hits
an area of ice and loses
all frictional force on its tires.
Which path does the car follow on the ice?

 

June 2001 Regents

 

 

 

 

 

 

B,

Tangent to
the semi-circle

 

 

 







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