Rotational Motion Quiz

A fan spins with a constant angular speed of 500 radians/second. How long will it take to cover an angle of 2π radians (one revolution)?

• 0.013 s

• 0.002 s

• 76.9 s

• 6.28 s

A gear spins at a rate of 400 revolutions/minute. Which choice is closest to its angular speed in radians/second?

• 6.67 rad/s

• 2500 rad/s

• 41.9 rad/s

• 20.9 rad/s

2600 rev/min is equivalent to which of the following?

• 2600 rad/s

• 43.3 rad/s

• 273 rad/s

• 60 rad/s

You are making a circular turn in your car on a horizontal road when you hit a big patch of ice, causing the force of friction between the tires and the road to become zero. While the car is on the ice, it

• continues to follow a circular path, but with a radius larger than the original radius.

• moves along a straight-line path toward the center of the circle.

• moves along a straight-line path away from the center of the circle

• moves along a straight-line path in its original direction.

1 revolution = _____________ radians.

• Pi

• 1

• 2Pi

• 360

Kinematic equations provide ___________________________.

• a way to predict/analyze motion that is descriptive only

• a way to predict/analyze motion that explains the origins of the motion

• random equations of motion

• no real value in Physics

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

• - 8 rad/s²
• + 8 rad/s²
• -100 rad/s²
• -20 rad/s²

Which has greater linear 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

The angle through which a point, line, or body is rotated in a specific direction and around a specific axis •

• angular velocity

• angular displacement

• radian

• degree