1A load of 800 N is to be lifted using a lever. The distance from the load to the fulcrum is 50 cm and the distance from the fulcrum to the effort is 1.5 m. How much effort must be applied to lift this load?
2A lever needs an effort of 150 N to raise a load of 600 N. What is the mechanical advantage of this lever, and what does it mean?
3State the working principle of the lever and write it in symbols.
4How can the principle of the lever be proved using a scale and a stand?
5Why does a shorter load distance allow a smaller effort to lift a bigger load?
6Why does mechanical advantage have no unit?
7A load of 900 N is 0.4 m from the fulcrum and the effort is applied 1.8 m from the fulcrum. Find the effort and the mechanical advantage.
8How does friction affect the mechanical advantage of a lever?