Consider a machine whose mechanical advantage is 5. It raises a load of 25 N. Calculate the minimum effort that has to be applied to it.

What is the mechanical advantage of a lever if a load of 80 N is moved by an effort of 20 N?

Mechanical advantage is greater than 1 when the load is greater than the effort.

A plank of length 4 m is inclined to the ground such that its one end is resting on the ground and the other end is 1 m above ground level. Calculate the effort that has to be applied to push a load of 48 N up the plank.

If the mechanical advantage of a lever is equal to 1, then the effort applied on it ______ the load.

The efficiency of a simple machine having mechanical advantage 5 is 80% . If the displacement of the effort in lifting a load by using the machine is 20 cm, find the displacement of the load.

(a) (i) State the principle of moments as applied to the lever shown in Figure. And (ii) calculate its mechanical advantage if AB=2*0m and FA=20cm . (b) Calculate the effort needed to lift and load.

Find the mechanical advantage of of a lever which allows 40 N load to be lifted with a force of 8 N.