ISRO Mechanical & Aerospace 2009 - Question 25

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[Image Question - Placeholder] A roller of weight W is rolled over the wooden block shown in the given figure. The pull required just to cause the said motion is

Figure for question 25, ISRO Mechanical & Aerospace 2009

  • A. W/2
  • B. $\sqrt{3}W$
  • C. W
  • D. 2W

Answer: B. $\sqrt{3}W$

Explanation: From moment equilibrium about the corner of the block, assuming the force is horizontal and angle is 60 degrees from vertical, $F = W \tan 60 = \sqrt{3}W$.

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