1. An inclined plane is used to lift a box into a moving truck. The ramp is 6m long and 1.5m from the ground. What is the mechanical advantage of the inclined plane? 2. What is the mechanical advantage of the following pulley? The pulley has six supporting ropes but the force end is down.

3. The work output of a lever used to lift books is 30 Joules and the work input is 60 Joules. What is the efficiency of this lever?

4. Scott needs to split a chunk of wood for the fire. There is a crack in the chunk. If he uses an axe it will use 200 Joules of energy. He receives 100 Joules of work out of the machine.
A) What type of simple machine has he used?
B) What is the efficiency of the machine?

5 . Would you do more work moving 100 boxes weighing 12N for 1m or moving a 1000N box, 30cm? Support your answer.