Circular Motion

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

Where is the net force when the rollercoaster is at the top of the loop?

• Towards the sky

• Towards the Right

• Towards the left

• Towards the center of the circle

In uniform circular motion, the magnitude of the _______________________of an object is constant but the __________ is continually changing.

• speed, acceleration

• speed, direction

• acceleration, speed

• acceleration, velocity

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.

Which of the following is the unit for centripetal force?

• J
• m/s²
• kg⋅m/s
• N

The time taken for one complete circuit is called the... 

• Period
• Frequency 
• Angular velocity

The rock is tied to a string and swung in a circular path as shown. The 1 meter string is tied to a post, and during the motion, the string has a 30° angle with the post. The rock makes 100 rounds in 1 minute. The velocity of the rock is ______ m/s.

• 14.8

• 5.2

• 9.2

• 7.5

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

Tom is riding a merry-go-round of radius 1.5 meters. This merry-go-round makes 8 revolutions in 2 minutes. Its period is ____ seconds.

• 15

• 20

• 12

• 10

Why does an object experiencing uniform circular motion have an acceleration?

• because it ir changing speed

• because it is changing direction

• because it is moving n a straight line

• because it has mass