Showing 121 to 130 of 2573 Questions
  • Blocks A and B have a mass of 7 kg and 10 kg, respectively. Using the coefficients of static friction indicated, determine the largest vertical force P which can be applied to the cord without causingmotion.

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    261
  • Blocks A and B have weight W, and D weighs WD. Using the coefficients of static friction indicated, determine the frictional force between blocks A and B and between block A and the floor C. Given: W = 75 lb μBA = 0.6 WD = 30 lb μAC = 0.4 μ = 0.5 θ = 20 deg

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    114
  • Blocks A and B weigh 75 lb each, and D weighs 30 lb. Using the coefficients of static friction indicated, determine the frictional force between blocks A and B and between block A and the floorC.

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    162
  • Blocks A and B weigh W1 and W2, respectively. Using the coefficients of static friction indicated, determine the greatest weight W of block E without causing motion. Given: W1 = 50 lb d = 12 W2 = 30 lb μ A = 0.3 a = 1.5 ft μ B = 0.5 b = 2 ft μC = 0.2 c = 5 μD = 0.3

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    285
  • Blocks A and B weigh WA and WB and respectively. Using the coefficients of static friction indicated; determine the greatest weight of block D without causing motion. Given: WA = 50 lb WB = 30 lb μ = 0.5 μ BA = 0.6 μAC = 0.4 θ = 20 deg

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    112
  • Blocks A, B, and C have weights of 50 lb, 25 lb, and 15 lb, respectively. Determine the smallest horizontal force P that will cause impending motion. The coefficient of static friction between A and B is μs = 0.3, between B and C, μ’s = 0.4, and between block C and the ground μ’’s =0.35,

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    91
  • Blocks D and F weigh W1 each and block E weighs W2. Determine the sag s for equilibrium. Neglect the size of the pulleys.Given:W1 = 5 lbW2 = 8 lba = 4 ft

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    903
  • By squeezing on the hand brake of the bicycle, the rider subjects the brake cable to a tension T If the caliper mechanism is pin-connected to the bicycle frame at B, determine the normal force each brake pad exerts on the rim of the wheel. Is this the force that stops the wheel from turning? Explain. Given:T = 50 lba = 2.5 inb = 3 in

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    602
  • Cable AB exerts a force of 80 N on the end of the 3-m-long boom OA. Determine the magnitude of the projection of this force along theboom.

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    176
  • Cable ABCD supports the 10-kg lamp E and the 15-kg lamp F. Determine the maximum tension in the cable and the sag yB of pointB.

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    94
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