Angular Motion and Torque

The video tutorial covers angular motion, distinguishing between spin and orbital motion. It explains angular quantities like displacement, velocity, and acceleration, and introduces rotational kinematics. The concept of torque is defined, highlighting its role in rotational motion and its dependence on force and lever arm length. The tutorial also references Archimedes' principle on leverage.

What is the difference between spin and orbital motion?

• Spin is around an external axis, orbital is around an internal axis.

• Spin is around an internal axis, orbital is around an external axis.

• Both spin and orbital are around an external axis.

• Both spin and orbital are around an internal axis.

How is angular displacement measured?

• In degrees

• In radians

• In meters

• In seconds

What is the SI unit for angular velocity?

• Revolutions per minute

• Radians per second

• Degrees per second

• Meters per second

Which of the following is true about angular acceleration?

• It is the change in angular displacement over time.

• It is the change in angular velocity over time.

• It is the change in linear velocity over time.

• It is the change in linear displacement over time.

What is the relationship between linear and angular kinematics?

• Linear kinematics is a subset of angular kinematics.

• They are completely unrelated.

• Angular kinematics equations are direct analogs of linear kinematics equations.

• Angular kinematics is a subset of linear kinematics.

What is torque?

• The ability of a force to move an object in a straight line.

• The ability of a force to rotate an object around an axis.

• The ability of a force to change the mass of an object.

• The ability of a force to stop an object from moving.

How does the length of the lever arm affect torque?

• The length of the lever arm does not affect torque.

• A longer lever arm decreases torque.

• A longer lever arm increases torque.

• A shorter lever arm increases torque.