If a pulley system with an ideal mechanical advantage of 2 is used in lifting a 2,000 lb. car, how far would the car move if the effort moved 2 ft.?

1 Answer
Nov 19, 2015

Answer:

#1"ft"#

Explanation:

Since work = force x distance and assuming 100% efficiency we can write:

#F_lxxD_l=F_exxD_e#

#:.F_l/F_exxD_l=D_e#

Since #MA=F_l/F_e=2# we can write:

#2xxD_l=D_e=2#

#:.D_l=2/2=1"ft"#