Chapter 18.2, Problem 2bTH

Suppose that each force shown above is exerted for the same time interval $△t$ .

Compare the magnitudes of the final angular velocities of the blocks $\left({\text{ω}}_{1\text{f}},{\text{ω}}_{\text{2f}},{\text{ω}}_{\text{3f}}\right)$ at the end of this time interval. If for any block ${\text{ω}}_{\text{f}}=0$ , state that explicitly. Explain.