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6/47 A block of mass mo is placed between the vertical wall and the upper end A of the uniform slender bar 2) of mass m. If the coefficient of static friction is u, be- tween the block and the wall and also between the block and the bar, determine a general expression for the minimum value 6min of the angle 0 for which the block will remain in equilibrium. Evaluate your expression for the conditions µg = 0.5 and (a) = 0.1, mo m (b) = 1, and mo m (c) = 10. mo For each case, state the minimum coefficient of sta- tic friction (ug)B necessary to prevent slippage at B. Ans. (a) 0min = 61.2°, (µ,)B = 1.667 (unusual!) (b) 0min = 45°, (µz)B = 0.667 (c) 0min = 10.30°, (µ̟)B = 0.0952 mo B Problem 6/47

6/47 A block of mass mo is placed between the vertical wall and the upper end A of the uniform slender bar 2) of mass m. If the coefficient of static friction is u, be- tween the block and the wall and also between the block and the bar, determine a general expression for the minimum value 6min of the angle 0 for which the block will remain in equilibrium. Evaluate your expression for the conditions µg = 0.5 and (a) = 0.1, mo m (b) = 1, and mo m (c) = 10. mo For each case, state the minimum coefficient of sta- tic friction (ug)B necessary to prevent slippage at B. Ans. (a) 0min = 61.2°, (µ,)B = 1.667 (unusual!) (b) 0min = 45°, (µz)B = 0.667 (c) 0min = 10.30°, (µ̟)B = 0.0952 mo B Problem 6/47

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6/47 A block of mass mo is placed between the vertical wall and the upper end A of the uniform slender bar 2) of mass m. If the coefficient of static friction is u, be- tween the block and the wall and also between the block and the bar, determine a general expression for the minimum value 6min of the angle 0 for which the block will remain in equilibrium. Evaluate your expression for the conditions µg = 0.5 and (a) = 0.1, mo m (b) = 1, and mo m (c) = 10. mo For each case, state the minimum coefficient of sta- tic friction (ug)B necessary to prevent slippage at B. Ans. (a) 0min = 61.2°, (µ,)B = 1.667 (unusual!) (b) 0min = 45°, (µz)B = 0.667 (c) 0min = 10.30°, (µ̟)B = 0.0952 mo B Problem 6/47
Transcribed Image Text:6/47 A block of mass mo is placed between the vertical wall and the upper end A of the uniform slender bar 2) of mass m. If the coefficient of static friction is u, be- tween the block and the wall and also between the block and the bar, determine a general expression for the minimum value 6min of the angle 0 for which the block will remain in equilibrium. Evaluate your expression for the conditions µg = 0.5 and (a) = 0.1, mo m (b) = 1, and mo m (c) = 10. mo For each case, state the minimum coefficient of sta- tic friction (ug)B necessary to prevent slippage at B. Ans. (a) 0min = 61.2°, (µ,)B = 1.667 (unusual!) (b) 0min = 45°, (µz)B = 0.667 (c) 0min = 10.30°, (µ̟)B = 0.0952 mo B Problem 6/47
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