GATE Mechanical Engineering (ME) 2019 Shift 2 Solved Paper

Question : 36 of 65

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A short shoe external drum brake is shown in the figure. The diameter of the brake drum is 500 mm. The dimensions a = 1000 mm, b = 500 mm and c = 200 mm. The coefficient of friction between the drum and the shoe is 0.35. The force applied on the lever F = 100 N as shown in the figure. The drum is rotating anti-clockwise. The braking torque on the drum is _______ N.m (round off to two decimal places).

Your Answer:

Validate

Solution:

Applying momentum about point O.

∑ M_{H}=0

F × a+µ R_{N} × c-R_{N} × b=0

R_{N}=232.55

Breaking Torque

=µ R_{N} R_{N}=20.34

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