Simple Machines and Mechanical Advantage

A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?

What is the mechanical advantage of a lever that has an input arm of 3 meters and an output arm of 2 meters?

A lever with an input arm of 2 meters has a mechanical advantage of 4. What is the output arm’s length?

A rake is held so that its input arm is 0.4 meters and its output arm is 1.0 meters. What is the mechanical advantage of the rake?

A lever with an output arm of 0.8 meter has a mechanical advantage of 6. What is the length of the input arm?

A child’s toy rake is held so that its output arm is 0.75 meters. If the mechanical advantage is 0.33, what is the input arm length?

A broom with an input arm length of 0.4 meters has a mechanical advantage of 0.5. What is the length of the output arm?

Identify the following simple machine

• lever

• pulley

• wheel and axle

• inclined plane

Identify the following simple machine

• lever

• pulley

• wheel and axle

• inclined plane

Identify the following simple machine

• lever

• pulley

• wheel and axle

• inclined plane