ROTATIONAL MOTION

What is the role of the fulcrum in a lever system?

• To apply the load
• To measure force
• To reduce weight
• To serve as the pivot point for rotation

In the couple moment derivation, what does (r₂ - r₁) × F represent?

• Net force
• Kinetic energy
• Potential energy
• The total torque due to the couple

What is the main advantage of a high mechanical advantage lever?

• It saves distance
• It increases speed
• It reduces friction
• It allows lifting heavy loads with small effort

If a lever is in equilibrium and the load increases, what must happen to maintain balance?

• Nothing
• Load arm must increase
• Fulcrum must move
• Effort or effort arm must increase

How does a couple differ from a single force in its effect?

• It produces translation only
• It has no effect
• It stops motion
• It produces rotation without translation