Circular Motion Quiz

If a body completes 10 rotations in 13.4 seconds, what is its frequency?

• 0.746 Hz

• 0.134 Hz

• 7.46 Hz

• 1.34 Hz

How do you calculate the angular velocity of an object?

• 2π divided by the time period

• 2π times the frequency

• 1 divided by the time period

• 2π times the radius

What is the linear velocity of an object with a radius of 1.7 m and angular velocity of 4.69 s^-1?

• 7.97 m/s

• 6.97 m/s

• 8.97 m/s

• 9.97 m/s

Which statement about circular motion is incorrect?

• There is no work done by the centripetal force.

• The speed of the object is constant.

• The resultant force is towards the center.

• The resultant force must be along the tangent of the circle.

What does the gradient of a speed vs. radius graph represent in circular motion?

• Mass of the object

• Centripetal force

• Linear velocity

• Angular velocity

How is the centripetal force related to the radius of rotation?

• Independent

• Inversely proportional

• Directly proportional

• Exponentially proportional

In a conical pendulum, what is the relationship between tension and the angle to the vertical?

• Tension is equal to mg times cos(theta)

• Tension is equal to mg times sin(theta)

• Tension is equal to mg divided by sin(theta)

• Tension is equal to mg divided by cos(theta)

What is the speed of a conical pendulum with a radius of 0.1 m and an angle of 12°?

• 0.36 m/s

• 0.56 m/s

• 0.66 m/s

• 0.46 m/s

What is the tension at the bottom of a vertical circle for a 5 kg mass moving at 10 m/s with a radius of 4 m?

• 170 N

• 147 N

• 1170 N

• 174 N

What is the centripetal force for an object moving in a circle with mass m, velocity v, and radius r?

• mv/r^2

• m^2v/r

• mvr

• mv^2/r