An electric motor produces a force of 5 N at a distance of 0.2m from the centre of rotation and rotates at a speed of 100 revs/sec. The motors output is
- 100 horsepower.
- 628.4 watts.
- 314.2 watts.
Explanation
Mechanical output power is torque times angular velocity. Torque = force * radius = 5N * 0.2m = 1 N*m. Angular velocity = 2pi * 100 rev/s = 628.3 rad/s. Power = 1 * 628.3 ~ 628.4W. The 314.2W answer omits the factor of two from using pi instead of 2pi.
arifadli8 asking:
How??
Community Comments (1)
D
dimky Posts: 514 31.12.2013 / 14:54
Power in a motor = torque * 2pi * revs/sec.
Torque = force * radius.
Torque = force * radius.
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