Quiz 1: Circular motion

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.

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

________________________ defined as the number of revolutions (cycles/rotations) completed in one second.

• frequency

• period

• distance

• centripetal acceleration

Which of the following is the unit for centripetal force?

• J

• m/s²

• kg⋅m/s

• N

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

• Period

• Frequency

• Angular velocity

Which represents the acceleration of the ball?

• A

• B

• C

• D

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

The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle.

• friction force

• centrifugal force

• normal force

• applied force

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

• 5 m/s²

• 17.63 m/s²

• 10 m/s²

• 8.81 m/s²