Physics fill in the blanks.

The mechanical advantage of a lever is equal to the ratio of the length of its ___________ [effort/load] arm to the length of its [effori/load] arm.

In class III lever, the effort arm is always ___________ [larger than/smaller than/equal to] the load arm.

A class ___________ [I/II/III] lever always acts as a force multiplier.

The ___________ [load/effort/fulcrum] does not move, but remains fixed when the lever is in use

Actually, mechanical advantage for all practical machines is always ___________ [greater than/less than/equal to] its velocity ratio.