A load of 75kgf is raised with a pulley system with an effort of 25kgf what is the mechanical advantage?

If the two-pulley system is 75% efficient, what is its mechanical advantage?

In the following figure : What is the efficiency of this pulley system if the mechanical advantage is 3?

If an effort of 10 N is applied on a single-fixed pulley to lift a weight of 10 N, then find out its mechanical advantage.

A crowbar is of 150 cm length. Its fulcrum is at a distance of 50 cm from the load. Find out the mechanical advantage.

The crow bar is a type of lever as shown in the figure. A crow bar of length 150 cm has its fulcrum at a distance of 25 cm from the load: Calculate mechanical advantage of this crow bar.

A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. The mechanical advantage of the crow bar is

A pulley system has velocity ratio of 4 and efficiency 90%. Calculate, (i) the mechanical advantage of the system and (ii) the effort required to raise a load of 300 N by the system.