Mechanical EngineeringAnswer only number 3. B. Solve the following problems.1. It took a constant 500 W power to run an engine from rest to its operating speed in 20 seconds. What is the operatingspeed of the rotating engine if its moment of inertia is 0.2 kg-m2?2. You apply a constant torque of 100 Nm to tighten a bolt. If it took 10 revolutions for the bolt to tighten up, how muchwork did you do?3. An electric motor consumes 9.00 kJ of electrical energy in 1.00 min. If one-third of this energy goes into heat and otherforms of internal energy of the motor, with the rest going to the motor output, how much torque will this engine develop ifyou run it at 250 rpm?

Given Energy, Q = 9 kJ Time, t = 1 min = 60 sec Speed, N = 250 rpm Find Torque, T

3. An electric motor consumes 9.00 kJ of electrical energy in 1.00 min. If one-third of this energy goes into heat and other forms of internal energy of the motor, with the rest going to the motor output, how much torque will this engine develop if you run it at 250 rpm?

3. An electric motor consumes 9.00 kJ of electrical energy in 1.00 min. If one-third of this energy goes into heat and other forms of internal energy of the motor, with the rest going to the motor output, how much torque will this engine develop if you run it at 250 rpm?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Mechanical Engineering

Answer only number 3.

B. Solve the following problems.
1. It took a constant 500 W power to run an engine from rest to its operating speed in 20 seconds. What is the operating
speed of the rotating engine if its moment of inertia is 0.2 kg-m2?
2. You apply a constant torque of 100 Nm to tighten a bolt. If it took 10 revolutions for the bolt to tighten up, how much
work did you do?
3. An electric motor consumes 9.00 kJ of electrical energy in 1.00 min. If one-third of this energy goes into heat and other
forms of internal energy of the motor, with the rest going to the motor output, how much torque will this engine develop if
you run it at 250 rpm?

Branch of science that deals with the stationary and moving bodies under the influence of forces.

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