A torque of 170 N∙m does 4700 J of work on a rotating flywheel.If the flywheel's initial kinetic energy is 1500 J, what is its final kinetic energy?
A)1500 J
B)3200 J
C)4700 J
D)6200 J
E)cannot be calculated without knowing the rotational inertia of the flywheel

Question

Quizplus · Accepted Answer

Work done by torque = change in kinetic energy 
4700 J = final kinetic energy - 1500 J 
Final kinetic energy = 6200 J

A Torque of 170 N∙m Does 4700 J of Work