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

question 92

Multiple Choice

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

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