PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is transmitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components ofreaction at the journal bearing C and thrust bearing D if θ = 0°. The bearings are in proper alignment and exert only force reactions on the shaft.
3. Determine the unstretched length of DB to hold the 40kg crate in the position shown. Take Spring constant, k
= 180N/m?
(1)
*4-48. The pipe of weight Wis to be pulled up the inclined
plane of slope a using a force P. If Pacts at an angle d, show
that for slipping P = W sin(a + 0)/cos(6 - 6), where e is
the angle of static triction; 8 = tan '-
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- Two blocks A and B have a weight of 50 N and 30 N, respectively. They are resting on the incline for which the coemicients of static fniction are = 0.15 and H = 0.25. The spring has a stifness of k 35 N/m (Egure 1) Part A Determine the incline angle 8 tor which both blocks begin to side. Express your answer in degrees to three significant figures. AX voc - O a ? Submit Request Answer Part B Find the required stretch or compression in the connecting spring for this to occur. Express your answer to three significant figures and include the appropriate units. HẢ D) ? Value mm Figure O 1 ef 1> Submit Resuest Answer Provida Feadbackarrow_forwardBased on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. F₁ = 70 N F2=80 N Unique Values for F 300 mm F3 = 40 N 8= 44 44° 250 mm 200 mm F₁ F2 80 mm A 150 mm Barrow_forwardA.The bar of negligible weight is supported by two springs, each having a stiffness k = 98 N/m. If the springs are originally unstretched, and the force is vertical as shown, determine the angle the bar makes with the horizontal, when the 31-N force is applied to the bar. B.Determine the stiffness k of each spring so that the 32-N force causes the bar to tip = 13.6° when the force is applied. Originally the bar is horizontal and the springs are unstretched. Neglect the weight of the bar.arrow_forward
- The structure is comprised of rigid bars AB and BCD supported by hinges at A and D. A steel rod at C provides additional support to the system. As shown, there is a roller connection between the bars at B. Determine the magnitude of the force P applied as shown if the vertical displacement of point B is limited to 1.5 mm. Neglect the weights of the bars.arrow_forward30°- 50 mm -20 mm- 10 mm The operation of the fuel pump for an automobile depends on the reciprocating action of the rocker arm ABC, which is pinned at B and is spring loaded at A and D. The vertical force acting on the rocker arm at A is FA = 50N, and at C it is Fc = 150N. When the smooth cam C is in the position shown, determine the magnitude of the force at B wwwwarrow_forwardA 4-14. The post is made of Douglas fir and has a diameter of 60 mm. If it is subjected to the load of 20 kN and the soil provides a frictional resistance that is uniformly distributed along its sides of w = 4 kN/m, determine the force F at its 20 kN bottom needed for equilibrium. Also, what is the displacement of the top of the post A with respect to its bottom B? Neglect the weight of the post. 4-19. The assembly consists of two A-36 steel rods and a rigid bar BD. Each rod has f10k unliad to thaarrow_forward
- please make it clear and box the answerarrow_forward4-14. The post is made of Douglas fir and has a diameter of 100 mm. If it is subjected to the load of 20 kN and the soil provides a frictional resistance distributed around the post that is triangular along its sides, that is, it varies from W = 0 at y = 0 to w = 12 kN/m at y = 2 m, determine the force F at its bottom needed for equilibrium. Also, what is the displacement of the top of the post A with respect to its bottom B? Neglect the weight of the post. 2 m 20 KN + 4 B Prob. 4-14 12 kN/marrow_forward8-22. The cylinder is confined by the brake, where 4, = 0.4. Determine the required compression in the spring in order to resist a torque of 800 N m on the cylinder. The spring has a stiffness of k = 3 MN/m and an unstretched length of 60 mm. End C of member ABC slides freely along the smooth vertical guide. Problem 8-22 250 mm 400 mm 200 mmarrow_forward
- Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is transmitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components ofreaction at the journal bearing C and thrust bearing D if θ = 45°. The bearings are in proper alignment and exert only force reactions on the shaft.arrow_forwardBefore the load is placed on the rigid plate, the top of the central spring is 20 mm lower than the outer springs. Each outer spring is made of 24 turns of 15-mm diameter wire on a mean radius of 60 mm. The central spring consists of 16 turns of 20 mm dimeter wire on a mean radius of 80 mm. If a load P = 5 kN is now placed on the rigid plate. Disregarding the weight of the plate, use G = 83 GPa and use Light spring formula. Determine the maximum shearing stress of the in uter spring. In MPaarrow_forwardQ4 / Determine the unstretched length (Lo) of spring Ac if a force P= 400 N causes the Ø=60° for equilibrium cord AB is 0.6m long . Take K=850 N/m. As shown in fig (4)? 0.6 m 0.6 m wwwarrow_forward
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