Mechanical Advantage

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

A rake has an effort arm of 0.4 meters and a load arm of 1 meter. What is the mechanical advantage of the lever?

A lever used to lift a heavy box has an effort arm of 3 meters and a load arm of 2 meters. What is the mechanical advantage of the lever?

A lever has a load arm of 1 meters and a mechanical advantage of 6. What is the size of the effort arm.

A lever used to lift a heavy box has an effort arm of 2 meters and has a mechanical advantage of 4. What is the size of the load and a load arm ?

What is the mechanical advantage in the picture?

What is the mechanical advantage in the picture?