Q1/ The rigid pole and cross-arm assembly is supported by the three cables shown. A turnbuckle at D is tightened until it induces a tension T in CD of 1.2 kN. Express T as a vector. Does it make any difference in the result which coordinate system is used? Ans. T = 0.321i + 0.641j – 0.962k kN, B 1.5 m /C 1.5 m G T= 1.2 kN 3 m 2 m 1.5m 3 m --

Q1/ The rigid pole and cross-arm assembly is supported by the three cables shown. A turnbuckle at D is tightened until it induces a tension T in CD of 1.2 kN. Express T as a vector. Does it make any difference in the result which coordinate system is used? Ans. T = 0.321i + 0.641j – 0.962k kN, B 1.5 m /C 1.5 m G T= 1.2 kN 3 m 2 m 1.5m 3 m --

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.59P: How many turns of rope around the capstan are needed for the 40-lb force to resist the 8000-lb pull...

See similar textbooks

Similar questions

Project the tension (T) of 8 (kN) onto the OB line. (Hint) Use the dot product.
A hydrogen balloon rises vertically with an upward force of 500 N and is attached to a point A at an elevation of 1m directly above the origin (0,0,0), which is in turn attached to 3 light ropes on the ground level at D (–3,0,0), B (2,0,2) and C (2,0, –2) in meters. Note the chosen x-y-z coordinate frame. (a) Draw a free body diagram FBD of the balloon with the 3 ropes AB, AC, and AD. (b) Draw a free body diagram FBD of the composite body of ropes AB and AC and the connector A (excluding the balloon and rope AD). (c) Write down the relevant equilibrium equations, and solve for tension of each rope, TAB, TAC, and TAD.
Determine whether or not it is stable for that position. R=0.75m h=1.50m
Topic: Couples, Resultant of Force Systems & Equilibrium If F1 = 10N, F2 = 15N, F3 = 8N, F4 = 10N, F5 = 18N, and the length of te side of a red square is 1m. Calculate magnltude (+ for CCW, - for CW) of the resuItant moment (N-m) about point A. Calculate the magnitude of the reItant f0rce (N). (Answer: 50.80Nm, 20.33N)
The pipe ABCDE is supported by ball-and-socket joints at A and D and by cable ECF that passes through a ring C with negligible friction and is attached to hooks at E and F. Knowing that the frame supports a uniformly distributed load of 1500 N/m along segment AB, do the following.1) Shows the correct vector representation of the resultant of the two tension forces acting at ring C. Note that T_CF = T_CE = T2) Explain along which line/axis you can sum moments to generate an equilibrium equation with only the magnitude of the tension force as the unknown. Explain your choice.3) Find the magnitude of the tension force.
Cables OA, OB, OC, and the vertical cable, knotted at O, support the 108lb weight. Cables OA and OB lie in the x-y plane. Sketch a complete free body diagram knot at O. Select the expression that describes the tension in cable OC, acting at O, as a Cartesian vector. a. - 3/13 Toc i + 4/13 Toc j + 12/13 Toc k b. 3/5 Toc i + 4/5 Toc j c. -Toc j d. - 3/13 Toc i + 12/13 Toc j + 4/13 Toc k
Complete the derivation of Eq. (8.15), which relates the tension in both parts of a V belt.(Reference to Equation 8.15):
find forces KJ, CD, CJ, and DJ
Solve Prob. 7.10 assuming that the pick-up truck has front-wheel drive.
The homogeneous bar AB weighs 25 lb. Determine the magnitudes of the forces acting on the bar at A and B. Neglect friction.
How many turns of rope around the capstan are needed for the 40-lb force to resist the 8000-lb pull of a docked ship? The static coefficient of friction between the capstan and the rope is 0.25.
The force P applied to the brake handle enables the band brake to reduce the angular speed of a rotating drum. If the tensile strength of the band is 3800 lb, find the maximum safe value of P and the corresponding braking torque acting on the drum. Assume that the drum is rotating clockwise.