Showing 141 to 150 of 1245 Questions
  • A group of students loads a 2 × 4-m flatbed trailer with two 0.6 × 0.6 × 0.6-mboxes and one 0.6 × 0.6 × 1.2-m box. Each of the boxes at the rear of the trailer is positioned so that it is aligned with both the back and a side of the trailer. Determine the smallest load the students should place in a second 0.6 × 0.6 × 1.2-m box and

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    90
  • A hand truck is used to move two barrels, each weighing 80 lb. Neglecting the weight of the hand truck, determine (a) The vertical force P which should be applied to the handle to maintain equilibrium when α = 35o, (b) The corresponding reaction at each of the two wheels.

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    170
  • A hawser is wrapped two full turns around a bollard. By exerting a 320-N force on the free end of the hawser, a dockworker can resist a force of 20kN on the other end of the hawser. Determine (a) The coefficient of static friction between the hawser and the bollard, (b) The number of times the hawser should be wrapped around the bollard i

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    91
  • A hexagonal plate is acted upon by the force P and the couple shown. Determine the magnitude and the direction of the smallest force P for which this system can be replaced with a single force at E.

    3
    597
  • A homogeneous wire is bent into the shape shown. Determine by direct integration the x coordinate of its centroid.

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    132
  • A homogeneous wire is bent into the shape shown. Determine by direct integration the x coordinate of its centroid.

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    349
  • A homogeneous wire is bent into the shape shown. Determine by direct integration the x coordinate of its centroid. Express your answer in terms of a.

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    282
  • A homogeneous wire with a weight per unit length of 0.041 lb/ft is used to form the figure shown. Determine the moment of inertia of the wire with respect to each of the coordinate axes.

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    125
  • A horizontal circular plate having a mass of 28 kg is suspended as shown from three wires which are attached to a support D and form 30° angles with the vertical. Determine the tension in each wire.

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    236
  • A horizontal circular plate is suspended as shown from three wires which are attached to a support at D and form 30° angles with the vertical. Knowing that the x component of the forces exerted by wire CD on the plate is –40 lb, determine (a) The tension in wire CD, (b) The angles θx, θy, and θz that the force exerte

    0
    761
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