levers

What is a lever?

A rigid bar or object that moves around a fulcrum with two forces applied on it

What is the load in a lever?

The weight/resistance to be moved e.g. a body part, an object, or resistance met

What is the effort in a lever?

The source of energy that works to move the load e.g. muscles in the body

What is a fulcrum of a lever?

A fixed point of pivot. E.g. a joint in the body

What is mechanical disadvantage?

When a levers load is larger than its effort

What is mechanical advantage?

Allows a large load to be moved with a relatively small effort

What is a first class lever?

A mechanism where the fulcrum is located between the effort and the load

What is a second class lever?

A mechanism where the load is located between the fulcrum and the effort

What is a third class lever?

A mechanism where the effort is applied between the fulcrum and the load

Give one example of a third class lever in sport

A bicep curl, kicking a football, swinging a racket, throwing a ball, hamstring curl

Give an example of a second class lever in sport

Plantar flexion of the ankle, push up

give an example of a first class lever in sport

Heading in football, tricep extensions, javelin throw, rowing