Rotational Motion: Tangential and centripetal acceleration
Why do we use the word “speed” rather than “velocity” in discussing rotational motion?

 
 

What is tangential speed?
 
 

What is the formula for tangential speed?
 
 

Use a diagram to illustrate different tangential speeds of two objects with the same angular speed.
 
 
 

Give three examples in which two objects within the same system have different tangential speeds.
 
 
 
 
 

A lady passes through a revolving door with a tangential speed of 1.8 m/s.  If she is 0.80m from the center of the door, what is the door’s angular speed?
 
 
 

What is tangential acceleration?
 
 
 

What are the two formulas for tangential acceleration?
 
 
 

A dog on a merry-go-round  undergoes a 1.5 m/s2 linear acceleration.  If the merry-go-round’s angular acceleration is 1.0 rad/s2, how far is the dog from the axis of rotation?
 
 
 

What is centripetal acceleration?
 
 

What is the formula for centripetal acceleration?
 
 

How can a car be moving at a constant speed be accelerating?
 
 

Draw a diagram of something moving with rotational motion and show where the tangential acceleration and the centripetal acceleration are?
 
 
 

What is centrifugal force?
 
 

Draw a diagram to show how it and the Loch Ness monster are related.
 
 
 


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