Mechanical Advantage The pulley system shown in the figure is used to lift a m= 67-kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulleys, and ropes are negligible.
a) Determine the force F required to lift the crate with constant speed.
b) Determine the tension in the upper chain.
c) Determine the tension in the lower chain.
1 answer
no figures here.