Alan will use a two wheel compound pulley to lift a crate from the floor of his garage to a

Question

storage shelf. The shelf is 5 meters above the floor. Alans pulls 10 meters of rope to lift the
crate. Which statement is correct?
Alan uses one-half the force he would have needed without the compound pulley
Alan uses one-third the force he would have needed without the compound pulley
A two wheel compound pulleys will double the weight of the object Alan is lifting.
Alan has to use three times the force he would have used without the compound pulley

Answer 1

Alan uses one-half the force he would have needed without the compound pulley.