ROTATIONAL MOTION

What happens to a light rod when two equal and parallel forces act perpendicularly at its ends in the same direction?

• It remains completely at rest
• It rotates without translation
• It is in rotational equilibrium but not in translational equilibrium
• It is in translational equilibrium but not in rotational equilibrium

What is a couple in physics?

• Any two forces acting on a body
• Forces that cancel each other and prevent any motion
• A single large torque-producing force
• A pair of forces of equal magnitude, opposite direction, and different lines of action

Under what condition will a rigid body experience pure rotation without translation?

• When net force and net torque are both zero
• When it is in rotational equilibrium but not in translational equilibrium
• When both force and torque are unbalanced
• When it is in translational equilibrium but not in rotational equilibrium

What characterizes a body in rotational equilibrium?

• Net force is zero
• Acceleration is maximum
• Net torque acting on the body is zero
• Velocity is zero

What is the net force acting on a rigid body in translational equilibrium?

• Positive
• Negative
• Constant but non-zero
• Zero