ROTATIONAL MOTION

Which of the following best describes a couple in physics?

• Two forces acting in the same direction
• Two equal and opposite forces acting at the same point
• Two unequal forces acting at different points
• Two equal and opposite forces acting at different points on a body

What is the key feature that distinguishes a couple from a single force?

• A couple has more mass
• A couple moves faster
• A couple produces torque without net force, while a single force produces both
• A single force produces no torque

What is the net effect when two equal and opposite forces act at the same point on a body?

• Rotation occurs
• Translation occurs
• No motion occurs
• Oscillation occurs

How does the direction of force application affect the rotational outcome on a rod?

• It changes the mass
• It affects only translational motion
• It determines the sense (clockwise or counterclockwise) of the torque produced
• It changes the length

Why is the midpoint chosen as the reference point for torque in symmetric systems?

• It increases force
• It has no significance
• Because it is where gravity acts
• Because it is equidistant from symmetric force points, simplifying calculations