A horizontal meter stick of mass M is held in static equilibrium by 2 supports: • a vertical upward force F₁ at the position x1 (measured from the left end of the stick) • a vertical upward force F2 at the position x2 (measured from the left end of the stick) Check all the following which are true statements. There may be more than one correct answer! F F2 x1 x2 F1 F2 = Mg F1x1 = F2x2 either x1 or x2 must be less than 50cm

cements ents ons 5 rive tions Question 3 Three identical uniform rods are each acted on by two or more forces, all perpendicular to the rods and all equal in magnitude. Which of the rods could be in static equilibrium if an additional force is applied at the center of mass of the rod? 1 2 3 O Only 2 O Only 1 O Only 1 and 2 I three O Only 3

a) Cables AC and BC are connected to lifting points A & B, and joined together at C as shown in Figure Q1a. The angle = 200 and angle B = 50°. If the tension in each cable is 3.75 KN, calculate the force (F) and the angle a required to maintain point C in static equilibrium. Give your answers for F in kilonewtons (kN) and the angle a in degrees to two decimal places. A 3 F α B O

2. The left support of the cable shown is located 10 m below the right support. The lowest point on the cable is 13 m below the right support. If the maximum tension in the cable resulting from a uniformly distributed load w along the horizontal is 400 kN, determine: a. The angle between the cable and the horizontal at the right support; b. The magnitude of the distributed load w 13 m c. The length of the cable. •100 m

The forces are in static equilibrium. The 140 lb force is directed along the x-axis and the 300 lb force is directed along the negative z-axis. What is the angle between R and the z-axis? Provide your answer in degrees, but do not include units in your answer. Z X R ex лог 140lb A 1-50, 80, 160) lb By 300 lb Y

A thin rod having a mass of 4 kg is balanced vertically as shown in (Figure 1). Take L = 0.65 m. Figure F h 1 of 1 Part A Determine the height hat which it can be struck with a horizontal force F and not slip on the floor. This requires that the frictional force at A be essentially zero. Express your answer to three significant figures and include the appropriate units. h = Submit μÀ Value Provide Feedback Request Answer Units ? Next >

A horizontal 8.0 m long 57 N uniform bar at one end is attached to a wall by a frictionless hinge and at the other end is held up by a cable that is 45 ° to the horizontal as shown. i) What is the tension of the cable? a) 0.0 N b) 20 N c) 40 N d) 60 N e) 80 N

The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint O. Determine the magnitude of the resultant R of the two forces and the angle which R makes with the positive x-axis. The angle is measured counterclockwise from the positive x-axis. 3.6 kN 2.2 KN Answers: R= 9- 39° 100/0000] 200/000 www/ Town's www. Jensen www 57> KN

Figure FM 15° 12 cm- 24 cm- mg < 1 of 1 Calculate the magnitude of the force, FM, required of the "deltoid" muscle to hold up the outstretched arm shown in the figure. (Figure 1) The total mass of the arm is 3.3 kg Express your answer to two significant figures and include the appropriate units. μà FM = Submit Part B F₁ = X Incorrect; Try Again; 5 attempts remaining Submit Value Part C Calculate the magnitude of the force F exerted by the shoulder joint on the upper arm. Express your answer to two significant figures and include the appropriate units. Previous Answers Request Answer 0₁ = N Value Request Answer ? Units Calculate the angle (to the horizontal) at which the force Facts. Express your answer in degrees using two significant figures. G|| ΑΣΦ Doorco ? ? below the horizontal

The mass center G of the 1590-kg rear-engine car is located as shown in the figure. Determine the normal force under each tire when the car is in equilibrium. State any assumptions. Answers: -1251 mm-942 mm Normal force under each of the front tires: Nf= Normal force under each of the rear tires: N₁ = i i N N