ROTATIONAL MOTION

What is the physical meaning of moment of inertia?

• It measures linear speed
• It indicates gravitational pull
• It determines color
• It measures the resistance of a body to changes in its rotational motion

How does the linear velocity of a point on a rotating rigid body depend on its distance from the axis?

• It is inversely proportional
• It is independent of distance
• It decreases with distance
• It is directly proportional to the distance

What is the relationship between torque and angular acceleration?

• Torque equals force times velocity
• Torque equals mass times acceleration
• Torque equals energy divided by time
• Torque equals moment of inertia times angular acceleration

Why is angular velocity considered a vector quantity?

• Because it measures speed only
• Because it is scalar in nature
• Because it has no direction
• Because it has both magnitude and direction along the axis of rotation

What is the significance of the vector product (cross product) in rotational dynamics?

• It calculates kinetic energy
• It adds linear velocities
• It measures mass
• It is used to define torque and angular momentum