Tuesday, 06 May 2014 13:33

## B2-34: EQUILIBRIUM OF TORQUES - ANGLE BRACKET

• ID Code: B2-34
• Purpose: Verify the equation for torques when the center of mass is outside the object
• Description:

A bracket is bent into a right triangle with arms of length a and 2a, and suspended from the end of the small arm as photographed. What is the angle of repose r of the small arm with the vertical, at equilibrium?

From the equation of torques, w1 x1 = w2 x2,

where: w1= mg and x1= a/2 sin r,

also: w2 = 2mg and x2 = a cos r - a sin r)

From these, tan r = 4/5, and r = 38.66 degrees.

• Availability: Available
• Loc codes: B2

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