A Modern Version of Joule's Experiment Has You Turn a Crank

Multiple Choice

A modern version of Joule's experiment has you turn a crank attached to an 85.0 g aluminum cylinder. A belt exerts a frictional torque on the cylinder of 1.50 Nm. The specific heat of aluminum is 900 J/(kg·K) . How many turns of the crank are necessary to raise the temperature of the aluminum by 40 C°?

A) 325
B) 650
C) 900
D) 975
E) 1300