UNIT 2: VI. Rotational Dynamics

Moment of inertia is the rotational analogue of:

Torque is the rotational analogue of:

Rotational dynamics is primarily concerned with the relationship between rotational motion and:

• a) Angular displacement

• b) Angular velocity

• c) Moment of inertia

• d) Angular acceleration

Moment of inertia depends on the object's:

• a) Angular velocity only

• b) Mass distribution and the axis of rotation

• c) Angular acceleration only

• d) Torque applied

The ability of a force to cause rotation depends on:

• a) Only the magnitude of the force

• b) Only the point of application of the force

• c) Both the magnitude and the point of application (specifically the lever arm) of the force

• d) Neither the magnitude nor the point of application

A net external torque is applied to an object. Which of the following outcomes are possible according to Newton's second law for rotation?
(Choose all that apply)

• a) The object gains constant angular acceleration

• b) The angular velocity of the object changes over time

• c) The moment of inertia of the object changes

• d) The object starts rotating if it was initially at rest

Torque is zero when the line of action of the force passes through the axis of rotation.

• TRUE

• FALSE

Reorder the sequence of events when a spinning skater pulls in their arms.

• Moment of inertia decrease

• Angular momentum remains conserved
  

• Angular velocity increases
  

• No external torque acts

Categorize the following statements as either "Cause" or "Effect" in rotational motion scenarios:

Groups:

(a) CAUSE

,

(b) EFFECT

• The object starts rotating faster

• Moment of inertia decreases

• A torque is applied to a rigid body

• Angular velocity increases due to conservation of angular momentum

The energy associated with the rotation of an object is called:​ ​ (a)  

• Rotational kinetic energy
• Translational kinetic energy
• Potential energy
• Thermal energy