ROTATIONAL MOTION

How is the center of gravity of a body defined?

• The geometric center of the body
• The point where mass is maximum
• It is the point where the total gravitational torque on the body is zero
• The midpoint of the longest axis

When is a rigid body said to be in rotational equilibrium?

• When the net force is zero
• When the linear velocity is constant
• When the net external torque acting on it is zero
• When it is not moving

What is the primary condition for a rigid body to be in translational equilibrium?

• The net torque is zero
• The angular velocity is zero
• The net external force acting on the body is zero
• The moment of inertia is maximum

What is the main advantage of using center of mass in motion analysis?

• It increases complexity
• It is only for symmetric bodies
• It simplifies the problem by reducing it to a point mass
• It is outdated

What happens to torque if the force is applied at the axis of rotation?

• Torque is maximum
• Torque is zero
• Torque is halved
• Torque doubles