DP014 TORQUE

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

• 63.67 rad/s

• 41.9 rad/s

• 3819.71 rad/s

• 2594.31rad/s

A flywheel starts from rest, and has an angular acceleration of 4 rad/s². What will be its angular speed when it has made 2 revolutions?

• 7.09 rad/s

• 6.35 rad/s

• 10.03 rad/s

• 5.01 rad/s

Two bugs ride a turntable which is rotating at a constant rate of 4 rad/s. Bug A is at a radius of 4 cm, while bug B is at a radius of 8 cm. What is the velocity of bug B?

• 32 cm/s

• 2 cm/s

• 0.30 cm/s

• 15 cm/s

A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?

• 9.6 rad/s²

• 1.6 rad/s²

• 4.3 rad/s²

• 6.2 rad/s²

A 0.30m radius automobile tire rotates how revolutions it will make after starting from rest and accelerating at a constant 2.0 rad/s² over a 5.0 s interval?

• 4 revolutions

• 2 revolutions

• 3 revolutions

• 5 revolutions

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

• Meters per second

• Revolutions per second

• Revolutions per minute

• Rotations per second

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

A fixed point, around which something turns, perpendicular to the rotation.

• axis of rotation

• diameter

• radius

• circumference of a circle

A body with a definite shape that doesn't change is:

• period

• angular acceleration

• rigid body

• radius of gyration

The number of complete revolutions per second is:

• frequency

• period

• torque

• rotational inertia