14) Which of the following simple machines provides the least mechanical advantage?
a) a block-and-tackle assembly that lifts a 1100
N load when you provide a 200 N input force
b) All four machines are equally efficient.
c) a wheel of radius 0.73 m with an axle of
radius 0.10 m
d) a wedge with sides 63 mm long and a base
10 mm wide
e) a lever 1 m long whose fulcrum is 63 cm
from the input force and 37 cm from the load

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.