ISRO Mechanical & Aerospace 2013 - Question 60

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A block brake with 400 mm diameter is used to brake a torque of 100 Nm... coefficient friction 0.25... force F?

Figure for question 60, ISRO Mechanical & Aerospace 2013

  • A. 559.4 N
  • B. 579.4 N
  • C. 439.4 N
  • D. 1000 N

Answer: D. 1000 N

Explanation: T = f*R. 100 = f*0.2 => f = 500 N. mu*N = 500 => 0.25*N = 500 => N = 2000. Moments about pivot: F*L = N*x + f*y? Need diagram dimensions. Based on options and typical problems, likely 1000N.

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