Understanding Lever Systems in GCSE PE

What are the three components of a lever system?

• Support, Mass, Energy

• Fulcrum, Load, Effort

• Pivot, Load, Power

• Base, Weight, Force

What does FRE123 represent in lever systems?

• The order of discovery for lever types

• A formula for calculating the efficiency of levers

• The sequence of applying force in lever mechanics

• A classification based on the central position of fulcrum, resistance, and effort

Which example illustrates a first-class lever system?

• Neck movement

• Calf raise

• Running

• Bicep curl

In a first-class lever system, what acts as the fulcrum during a tricep extension?

• The elbow

• The wrist

• The knee

• The shoulder

What is a characteristic feature of a second-class lever system?

• The resistance and the effort are at the same point

• The effort is between the fulcrum and the resistance

• The load is between the fulcrum and the effort

• The fulcrum is between the effort and the resistance

Which exercise is an example of a second-class lever system?

• Bicep curl

• Football throw

• Calf raise

• Tricep extension

Why does a second-class lever system have a mechanical advantage?

• Because the effort arm is longer than the resistance arm

• All of the above

• Because it uses less effort to move larger loads

• Because the fulcrum is closer to the resistance

What disadvantage does a third-class lever system have?

• It cannot lift heavy loads

• It is less common in the human body

• It has a longer resistance arm than effort arm

• It requires more effort for a smaller output force

Which scenario describes a third-class lever system?

• Using a seesaw

• Lifting a wheelbarrow

• Performing a bicep curl

• Opening a door