The rotor of an electric motor has an angular velocity of 3570 rpm when the load and power are cut off. The 65-kg rotor, which has a centroidal radius of gyration of 175mm, until it reaches the maximum speed of 5250 rpm. Knowing that the kinetic friction results in a couple of magnitude 4.5 N.m exerted on the rotor, determine the number of revolutions that the rotor executes, before achieving its maximum speed and the time it took. (The final answer should be in two decimal places with correct units)

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Q: The mechanism shown is one of two identical mechanisms attached to the two sides of a 90-kg uniform…

A: Data given-  m= 90 kg  k = 600 N/ m  Theta = 30°

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Q: In the engine system shown l = 250 mm and b = 100 mm. The connecting rod BD is assumed to be a…

A: GivenN = 400 rpm(c.w)l = 250 mm = 0.25 mb = 100 mm = 0.1 mmBD = 1.2 kg , mP= 1.8 kgθ=90°

Q: The rotor of an electric motor has an angular velocity of 4500 rpm when the load and power are cut…

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Q: A 9-kg uniform disk is attached to the 5-kg slender rod AB by means of frictionless pins at B and C.…

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Q: The 200-mm radius brake drum is attached to a larger flywheel that is not shown. The total mass…

A: calculated the number of revolutions executed by the flywheel before it comes to rest.

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Q: It takes 10 min for a 2.4-Mg flywheel to coast to rest from an angular velocity of 300 rpm. Knowing…

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Q: PROBLEM 16.29 The 100-mm-radius brake drum is attached to a flywheel which is not shown. The drum…

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Q: The rotor of an electric motor has an angular velocity of 4500 rpm when the load and power are cut…

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.