Chapter 5, Problem 76P

The 180-lb homogeneous bar is supported by a ball-and-socket joint at A and two cables attached to B. Determine the forces in the cables.

The 350-lb homogeneous plate has the shape of an isosceles triangle. The plate is supported by a thrust hinge at A, a slider hinge at B, and the cable CD. Find the force in the cable and the magnitudes of the hinge reactions.

The 60-lb homogeneous door is supported by hinges at A and B, with only the hinge at B being capable of providing axial thrust. The cable CD prevents the door from fully opening when it is pulled by the 40-lb force acting perpendicular to the door. Draw the FBD for the door, and count the unknowns.

The spring is connected to a rope that passes over the cylindrical surface and is attached to corner A of the rocker. The spring has a stiffness k and is undeformed when =0. When the weight W is suspended from A, the equilibrium position of the rocker is =30. Determine if this equilibrium position is stable. Neglect the weight of the rocker.

3/3 The weight of the bicycle is 29 lb with center of grav- ity at G. Determine the normal forces at A and B when the bicycle is in equilibrium. B - 22.5"- -18.5"- Problem 3/3

ASAP

Q1/ The 500-kg uniform beam is subjected to the three external loads shown. Compute the reactions at the support point O. The x-y plane is vertical. 30° 15 kN-m 3 kN C 1.4 kN 1.2 m- 1.8 m 1.8 m Q2/ A former student of mechanics wishes to weigh himself but has access only to a scale A with capacity limited to 100 lb and a small 20-lb spring dynamometer B. With the rig shown he discovers that when he exerts a pull on the rope so that B registers 19 lb, the scale A reads 67 lb. What is his correct weight? Q3/ When the 0.05-kg body is in the position shown, the linear spring is stretched 10 mm. Determine the force P required to break contact at C. Complete solutions for (a) including the effects of the weight and (b) neglecting the weight. P 60 mm 60 mm A 40 mm B www k = 1750 N/m 40 mm

Consider the following system in static equilibrium. Force vector Facts at a distance from the pin support at point O. Draw appropriate FBD as necessary. Assume frictionless pulleys If the reaction forces at O is zero and magnitude F is 169N, a. Find F and "a". (F need not necessarily be in the 4 quadrant as shown below) b. Find reaction forces at B. 4m Im 5m 12

The skid-steer loader has a mass of 1.18 Mg, and in the position shown. The center of mass is at G1. There is a 300-kg stone in the bucket, with center of mass at G2. There is a similar linkage on each side of the loader.   - Determine the magnitude of the reaction of the pair of wheels B on the ground. - Determine the magnitude of the reaction of the pair of wheels A on the ground. - Determine the magnitude of the force in the hydraulic cylinder CD. - Determine the magnitude of the force the force exerted on ED at the pin E.