Review for Physics QZ 8.1-8.3

• circumference

• diameter

• radian

• radius

Angular _______ is equal to the change in angular velocity divided by the time require to make that change.

• acceleration

• displacement

• rotation

• velocity

Angular displacement is the change in an object's _______ as it rotates.

• acceleration

• angle

• orbit

• velocity

A mass that rotates around its own axis is called a(n) ...

• orbiter

• projectile

• rigid rotating object

• satellite

If the radius of a CD is 6.0 cm and the angular velocity is 5.0 rad/s, what is the linear displacement of a point on the edge in 2.0 s?

• 0.30 m

• 0.60 m

• 3.8 m

• 60. m

_______ is a measure of how effectively a force causes a change in rotation.

• Acceleration

• Friction

• Moment of inertia

• Torque

The resistance to a change in rotation is called _______.

• friction

• moment of resistance

• moment of inertia

• torque

The _______ is the perpendicular distance from the axis of rotation to the point where the force is exerted.

• hinge

• lever arm

• pivot point

• rotational axis

In the illustration, why is there little to no effect?

• The force is applied parallel to the lever arm.

• The force is applied perpendicular to the lever arm.

• The force is applied perpendicular to the axis of rotation.

• The force is applied at the axis of rotation.

In the illustration, if the door is 0.90 m wide and you exert a force of 2.0 N, what is the magnitude of the resulting torque on the door?

• 0.40 N•m

• 0.45 N•m

• 1.8 N•m

• 2.9 N•m