Rotational Motion: Causes of circular motion
What is the name of the force that maintains circular motion?

 
 

What are the formulas for that force?
 
 
 

What is the source of the force that maintains the circular motion in the following:

a bicycle moving around a flat circular track.

the bicyclist moving on the bike around a flat circular track.

a bicycle moving around a curved circular track.


A girl sits in a tire that is attached to an overhanging tree limb by a rop 2.10 m in length.  The girl’s father pushes her with a tangential speed of 2.50 m/s.  If the magnitude of the force that maintains her circular motion is 88.0 N, what is the girl’s mass?
 
 
 
 

A 905 kg test car travels around a 3.25 km circular track.  If the magnitude of the force that maintains the car’s circular motion is 2140 N, what is the car’s tangential speed?
 
 
 

Why is a force directed toward the center necessary for circular motion?
 
 
 

Is inertia a force?  Explain.
 
 
 
 

What is gravitational force?
 
 
 

What is Newton’s Law of Universal Gravitation?
 
 
 

What is “G” and what does it equal?
 
 
 

A 90.0 kg person stands 1.00 m from a 60 kg person sitting on a bench nearby.  What is the magnitude of the gravitational force between them?
 
 
 
 

Mars has a mass of about 6.4 x 10^23 kg, and its moon Phobos has a mass of about 9.6 x 10^15 kg.  If the magnitude of the gravitational force between the two bodies is 4.6 10^15 N, how far apart are the planet and moon?
 
 
 


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