Exit Ticket:
1. A pulley is used to raise crates from a warehouse floor to the top of a stack. The crate's
weight is 650 newtons and the stack is 10 meters tall. You have to pull out 75 meters of
rope to move the crates while you exert a force of 100 Newtons on the rope.
a. How much work do you do on the pulley?
b. How much work does the pulley do on the crate?
c. What is the efficiency of this pulley?
d. What magnitude of energy was converted to heat?
