ROTATIONAL MOTION

What happens if the sum of moments is not zero in a lever system?

• It moves linearly
• It stops working
• It gains mass
• The lever will rotate

If the load arm is 0.5 m and effort arm is 2 m, what is M.A.?

• 0.25
• 1
• 2
• 4

What is the direction of the moment vector in a couple?

• Along the force
• Opposite to the force
• In the plane of the forces
• Perpendicular to the plane of forces

How does increasing the distance of effort from the fulcrum affect the system?

• It decreases M.A.
• It reduces load
• It makes the lever heavier
• It increases mechanical advantage

What is the condition for a lever to be in mechanical equilibrium?

• Only rotational
• Only translational
• Dynamic motion
• Both translational and rotational equilibrium