+1 vote
in Machine Dynamics by (34.3k points)
The brake shown in figure has a coefficient of friction 0.25 and is to operate using a maximum force F of 500 N. Assume width of the band to be 50 mm. Find the maximum band tension. All dimensions are in mm.

(a) 4449.6 N

(b) 4440.8 N

(c) 5432.4 N

(d) 4882.3 N

The question was asked by my school principal while I was bunking the class.

The above asked question is from Brakes in division Brakes and Dynamometers of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
Correct answer is (a) 4449.6 N

For explanation I would say: ΣMo = 0

= 115P2 – 365F = 0

P2 = 1586.96N

α = 33.59°

Φ = 270 – 33.59 = 4.126 radians

P1 = 4449.6N.

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