Chapter 6, Problem 23PCE

Mechanical Advantage The pulley system shown in Figure 6-41 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 Assuming the masses of the chains, pulleys and ropes are negligible, determine (a) the force $\stackrel{\to }{F}$ required to lift the crate with constant speed , (b) the tension in the upper chain, and (c) the tension in the lower chain.

Figure 6-41

Problem 23