ROTATIONAL MOTION

If a lever has M.A. = 0.5, what does it imply?

• Effort equals load
• Effort is half
• Effort is zero
• Effort is twice the load

What is the nature of forces in a couple?

• Perpendicular
• Converging
• Diverging
• Parallel and opposite

How does increasing the effort arm affect the effort needed?

• It increases effort
• It has no effect
• It doubles the load
• It decreases the effort needed

What is the condition for no rotation in a lever?

• F1 = F2
• d1 = d2
• R = 0
• d1F1 = d2F2

In which direction does the moment vector point in a couple?

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