Chapter 5, Problem 5.6DOEP

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PROBLEM 15.225 The bent rod shown rotates at the constant rate @₁ = 5 rad/s and collar C moves toward point B at a constant relative speed u = 39 in./s. Knowing that collar C is halfway between points B and D at the instant shown, determine its velocity and acceleration. Answers: v=-45 +36.6)-31.2 k in./s āc = -2911-270} in./s² 6 in 20.8 in. 14.4 in.

Need help, please show all work, steps, units and please box out and round answers to 3 significant figures. Thank you!..

Need help, please show all work, steps, units and please box out and round answers to 3 significant figures. Thank you!...

FL y b C Z Determine the moment about O due to the force F shown, the magnitude of the force F = 76.0 lbs. Note: Pay attention to the axis. Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 1.90 ft b 2.80 ft с 2.60 ft d 2.30 ft Mo 144 ft-lb = -212 × 1 + xk) ☑+212

20 in. PROBLEM 15.206 Rod AB is connected by ball-and-socket joints to collar A and to the 16-in.-diameter disk C. Knowing that disk C rotates counterclockwise at the constant rate ₁ =3 rad/s in the zx plane, determine the velocity of collar A for the position shown. 25 in. B 8 in. Answer: -30 in/s =

B Z 001 2.5 ft PROBLEM 15.236 The arm AB of length 16 ft is used to provide an elevated platform for construction workers. In the position shown, arm AB is being raised at the constant rate de/dt = 0.25 rad/s; simultaneously, the unit is being rotated about the Y axis at the constant rate ₁ =0.15 rad/s. Knowing that 20°, determine the velocity and acceleration of Point B. Answers: 1.371 +3.76)+1.88k ft/s a=1.22 -0.342)-0.410k ft/s² X

F1 3 5 4 P F2 F2 Ꮎ Ꮎ b P 3 4 5 F1 The electric pole is subject to the forces shown. Force F1 245 N and force F2 = 310 N with an angle = 20.2°. Determine the moment about point P of all forces. Take counterclockwise moments to be positive. = Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 2.50 m b 11.3 m C 13.0 m The moment about point P is 3,414 m. × N- If the moment about point P sums up to be zero. Determine the distance c while all other values remained the same. 1.26 m.

Z 0.2 m B PROBLEM 15.224 Rod AB is welded to the 0.3-m-radius plate, which rotates at the constant rate ₁ = 6 rad/s. Knowing that collar D moves toward end B of the rod at a constant speed u = 1.3 m, determine, for the position shown, (a) the velocity of D, (b) the acceleration of D. Answers: 1.2 +0.5-1.2k m/s a=-7.21-14.4k m/s² A 0.25 m 0.3 m