Chapter 6, Problem 109P

Determine the ratio P/Q of the forces that are required to maintain equilibrium of the mechanism for an arbitrary angle 0. Neglect the weight of the mechanism.

Determine the unstretched length of spring AC if a force P = 801b causes the angle 8 = 60 ° for equilibrium. Cord AB is 2 ft long. Take k = 50 lb / ft.

200 mm 50 Ν 250 mm 300 mm -150 mm 80 mm A 근 65 N V 80 N

Determine the reactions at the supports at A and C. Also, obtain the force exerted by the pin at B on bar BC. Take w = 150 N/m. B A 3 m -4 m -4 m- C 4 m

Determine the n- and t-components of the force F which is exerted by the rod AB on the crank OA. Evaluate your general expression for F = 90 N and (a) 0 = 29°, 3= 25° and (b) = 14°, 3 = 37° Answers: (a) Fn = (b) Fn = i i B BI A N, Ft= N, Ft= i N N

The jib crane is designed for a maximum capacity of  7 kN, and its uniform I-beam has a mass of  160 kg. Plot the magnitude R of the force on the pin at A as a function of x through its operating range of x =  0.2 m to x =  3.6 m. On the same set of axes, plot the x- and y-components of the pin reaction at A. Do these plots on a separate piece of paper. Then answer the following questions in Wiley Plus as a check for your work.(a) What is the value of R when x =  0.9 m?(b) What is the value of R when x =  3.1 m?(c) Determine the minimum value of R and the corresponding value of x.(d) For what value of R should the pin at A be designed?

Determine the components of the reaction force at point O for the frame shown below. The magnitude of the tension in the cable is 750 lb. The work must be clear and well-organized to receive full credit. All work must be shown to receive full credit. x 0.8 ft 1.6 ft Z 1.5 ft B y 35° 0.9 ft

The figure shows a bar in equilibrium position resting on the floor at point A and on the wall at point B. If the mass of the bar is m and the angle it makes with the floor is θ = π/6, find the magnitudes of the frictional and normal forces at points A and B.

The jib crane is designed for a maximum capacity of 9 kN, and its uniform I-beam has a mass of 260 kg. Plot the magnitude R of the force on the pin at A as a function of x through its operating range of x = 0.2 m to x = 3.4 m. On the same set of axes, plot the x- and y- components of the pin reaction at A. Do these plots on a separate piece of paper. Then answer the following questions in Wiley Plus as a check for your work. (a) What is the value of R when x = 1.6 m? (b) What is the value of R when x = 3.2 m? (c) Determine the minimum value of R and the corresponding value of x. (d) For what value of R should the pin at A be designed? 32° x m 9 KN 1.0 m 2.6 m Questions: (a) If x= 1.6 m, R= i (b) If x= 3.2 m, R = i (c) The minimum value for R = i (d) The pin should be designed to hold i KN KN kN at x = i kN.