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Uniform Circular Motion
Quiz 3
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Q.1
You are moving a ball in a circle usingN of centripetal force. What would the force be if you doubled the radius of the circle.
18 N
36 N
72 N
144 N
Q.2
When an object is in circular motion it is constantly changing its velocity.
True
False
Q.3
If an object is spinning around on a string and the string was suddenly cut, the object would move in a
curved path
straight line
Q.4
When an object is moving in a circle, its linear velocity is often called its __________ velocity.
centripetal
tangential
gravitational
centrifugal
Q.5
What happens to the centripetal force exerted on an object if you triple the velocity?
it increases to 3X
it decreases to 6X
it increases to 6X
it increases to 9X
Q.6
What happens if you let go of the string when you spin the stopper around your head?
the stopper continues moving in a circle
the stopper moves in a straight line
Q.7
Which statement is true about an object that is traveling in uniform circular motion?
The speed of the object varies.
The net force on the object is directed toward the center of the circular path.
The direction of the object's velocity is constant.
The net force on the object is directed away from the center of the circular path.
Q.8
A race car completes three laps of a circular track with a radius ofm in 9.0 seconds. Determine the speed of the car.
3.9 m/s
73.3 m/s
24.4 m/s
1.0 m/s
Q.9
What force keeps an object moving in a circle?
centripetal force (inward)
centrifugal force (outward)
0 h : 0 m : 1 s
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