Quiz on rotation

Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• The inside horse
• The outside horse
• Neither - they both have the same angular speed

If the translational velocity of an object is 3 m/s, and is located a distance of 2 m from the axis of rotation, what is the object's angular velocity?

• 0.67 rad/s
• 1.5 rad/s
• 5 rad/s
• 6 rad/s

An object completes 1.5 circular orbits in half a minute. What is its approximate angular velocity?

• 0.05 rad/s
• 0.30 rad/s
• 0.5 rad/s
• 3 rad/s

Which of the following is NOT a unit of rotational speed?

• Meters per second

• Revolutions per minute

• Revolutions per second

• Rotations per second

Which would have a greater linear velocity?

• Kid near the center of the merry go round
• Kid near the outside of the merry go round
• neither

An object completes 1.5 circular orbits in half a minute. It orbits with a radius of 2 m. What is the object's tangential speed?

• 0.15 m/s
• 0.60 m/s
• 1.6 m/s
• 6 m/s

A tin can whirled on the end of a string moves in a circle because 

• the can continually pulls on the string.
• once the can starts moving, that is its natural tendency.
• there is a force on the can pulling it outward.
• there is an inward force acting on the can.

A possible unit for angular acceleration is:

• rad/s²

• rad/s

• N*m

• Kg*m²

Torque is the product of a force exerted on an object times the lever arm.

• True 
• False

Does a bridge anchored resting on two pillars have any torque?

• No, it isn't moving
• Yes, but it is at equilibrium
• Yes, but it will soon break because of the torque
• No, Bridges can't have torque