Find out the number of revolution, Mechanical Engineering

Assignment Help:

Find out the number of revolution:

A flywheel of mass 20 kg and radius 100 mm is made to rotate at 600 RPM. Determine the KE of the flywheel. If the frictional couple at its bearing is 10 N.m., find out the number of revolution it shall make before coming to rest.

Solution

ω = 600 rpm = 10 r.p s.

= (10 × 2 π) rad / sec. = 62.8 rad / sec.

I m =     M a 2 / 2

= 20 × ((0.1)2 /2) = 0.1 kg m 2 = 197 N m.

If frictional couple at the bearing is CF, the W. D. by friction is (CF  × θ) to bring it to rest while

C F  × θ = KE of the flywheel

10 × θ = 197

∴ θ= 19.7 radians.

No. of cycles of rotations = θ /2 π = 3.14 cycles.


Related Discussions:- Find out the number of revolution

Determine the component of force , Determine the component of force: ...

Determine the component of force: The force of 500N is acting at a point subtends an angle of 60° with the horizontal. Determine the component of force along X and Y dire

Newton''s law of motion - first law, Newton's law of motion. Sol.: T...

Newton's law of motion. Sol.: The entire system of Dynamics is based on the three laws of motion that are basis assumptions, and were initially formulated by Newton. Fir

Illustrate boot-strap air evaporative cooling system, Why is it required of...

Why is it required of cooling the aeroplane ? Illustrate Boot-Strap Air Evaporative cooling system with neat sketch and T-S diagram.

Describe poissons ratio, (i) Describe Poisson's Ratio. (ii) A circular r...

(i) Describe Poisson's Ratio. (ii) A circular rod of 100mm diameter and 500 mm length is subjected to a tensile force of 1000 KN. Calculate the modulus of bulk modulus, rigidity

Statements of second law of thermodynamics, (a) Show that two statements of...

(a) Show that two statements of Second Law of thermodynamics are equivalent to each other. (b) A house that was heated by electric resistance heater consumed 1200 KWh of electri

Determine reactions of the overhanging beam, Determine reactions of the ove...

Determine reactions of the overhanging beam: Determine r eactions at points A and B of the overhanging beam as shown in the figure given below.

Find out the quality, Find out the quality: ABC industries manufacture...

Find out the quality: ABC industries manufacture X-band radar scanners utilized to detect speed traps. The printed circuit boards in the scanners are bough from an outside ven

Principal design criterion of plant layout, Q. Principal design criterion o...

Q. Principal design criterion of Plant layout? Safety-in-Design is a key factor associated with the layout design of any facility. The principal design criterion is to minimize

Manufacturing technology, with the aid of a diagram explain electrochemical...

with the aid of a diagram explain electrochemical grinding

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd