physics
posted by Tim .
A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever?
What is the ideal mechanical advantage of the lever? What is the efficiency of the lever? Show your work.

A basket of neglible wieght hangs from a vertical spring scale of constant force 1500N/m. If you sundally put a 3.0 Kg adobe brick in the basket, find the maximum distance that the spring will stretch. If, instead, you released the brick from 1.0 m above the basket, by how much will the spring stretch at its maximum elongation?