The Rotor of a Motor Is Accelerated from Rest by a Torque

question 4

Multiple Choice

The rotor of a motor is accelerated from rest by a torque of 250 N m. When it has rotated through 10 revolutions, the gain in angular kinetic energy is:

• A) 2.5kJ
• B) 5.0kJ
• C) 7.85kJ
• D) 15.7kJ

Identify the geographical locations associated with various African art traditions and historical sites.

Understand the significance of leadership, power, and hierarchical structures as represented in African art objects.

Acknowledge the diversity and specialty of African art forms spanning from sculpture to textile.

Recognize the intrinsic value and identifiers in African facial adornment and physical representation in art.

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Definitions:

Energy

The ability to do work, which can be transferred between objects and converted into different forms, such as electrical, thermal, or mechanical.

Pull-up Torque

The minimum torque generated by an electric motor during the acceleration from standstill to the speed where torque is maximum.

Breakdown Torque

The maximum torque a motor can produce when operating at full load, before the motor stalls or overheats.

Locked-rotor

Locked-rotor refers to a condition where the rotor of an electric motor cannot turn despite electrical current being applied, often due to mechanical obstruction or overload.