A tower crane must always be
carefully balanced so that there is no net torque tending to tip it. A particular crane at a building site is
about to lift a 2800-kg air conditioning unit.
dimensions are given in the figure. (a)
Where must the crane’s
9500-kg counterweight be placed when the load is lifted from the ground? (b)
Determine the maximum load that can be lifted with this counterweight when it
is placed at its full extent.