13. Rotational Inertia & Energy
Energy of Rolling Motion
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ANSWERS OPTIONS
A
9.00 N•m
B
12.0 N•m
C
1.43 N•m
D
1.91 N•m
An electric motor in a drill uses 180 kJ every 5 minutes supplied as electrical energy. The motor dissipates a quarter of the energy as internal energy such as heat and transfers the rest to output as useful work. Determine the torque developed when the motor is operating at 3000 rpm.