1What is a pulley? How does it make work easier?
2What is the difference between a fixed pulley and a movable pulley?
3What is the relation between the ratio of effort distance to load distance and the number of pulley wheels?
4In which pulley system is the ratio of load to effort the smallest and in which is it the largest? Why?
5Show that the velocity ratio of a single movable pulley is 2.
6If lifting a 300 N load with a pulley needs a force of 60 N, what is the mechanical advantage?
7The mechanical advantage of a single fixed pulley is 1 or even less. Why is it still used?
8Why do the velocity ratio and the mechanical advantage have no units?