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Instructor’s Solutions Manual for Engineering Mechanics: Statics Edition [EXP-823]

514 SOLVED PROBLEMS

A “scale” is constructed with a 4-ft-long cord and the 10-lb block D.The cord is fixed to a pin at A and passes over two small pulleys at B and C. Determine the weight of the suspended block at B if the system is in equilibrium when s = 1.5 ft.

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A 1000 cu ft tank contains 85 STB of crude and 20,000 SCF of gas, all at 120°F. When equilibrium is established, (i.e., when as much gas has dissolved in the oil as will), the pressure in the tank is 500 psia. If the solubility of the gas in the crude is 0.25 SCF/STB/psi and the deviation factor

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{ R }_{ s }=0.25(500)=125\frac { scf }{ sTB...

A 20-N horizontal force is applied perpendicular to the handle of the socket wrench. Determine the magnitude and the coordinate direction angles of the moment created by this force about point O.

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A 4-kg sphere rests on the smooth parabolic surface. Determine the normal force it exerts on the surface and the mass mB of block B needed to hold it in the equilibrium position shown.

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A biomechanical model of the lumbar region of the human trunk is shown. The forces acting in the four muscle groups consist of FR = 35 N for the rectus, FO = 45 N for the oblique, FL = 23 N for the lumbar latissimus dorsi, and FE = 32 N for the erector spinae. These loadings are symmetric with

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{ F }_{ R } = \sum {{ F }_{ ...

A boy stands out at the end of the diving board, which is supported by two springs A and B, each having a stiffness of k = 15kN/m. In the position shown the board is horizontal. If the boy has a mass of 40 kg, determine the angle of tilt which the board makes with the horizontal after he jumps off.

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Equations of Equilibrium: The spring force at A an...

A clockwise couple M = 5 N.m is resisted by the shaft of the electric motor. Determine the magnitude of the reactive forces -R and R which act at supports A and B so that the resultant of the two couples is zero.

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A concrete column has a diameter of 350 mm and a length of 2 m. If the density (mass/volume) of concrete is 2.45 Mg/m3 determine the weight of the column in pounds.

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A concrete column has a diameter of 350 mm and a length of 2 m. If the density (mass/volume) of concrete is 2.45 Mg/m^3, determine the weight of the column in pounds.

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A force F having a magnitude of F = 100 N acts along the diagonal of the parallelepiped. Determine the moment of F about point A, using MA = rB × F and MA = rC × F.

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