QUESTIONS
Figure 1 shows a part of a machine in which a beam is pivoted at its lower end while a hydraulic actuator actuates its upper end. Between the ends, a spring pulls down on the beam to assist in returning it to a rest position after the hydraulic force is removed. Prepare the free body diagrams of the beam, the spring, and the hydraulic actuator. Because the weight of the beam is small compared to the externally applied forces, neglect the weight in the diagram.
Also calculate the force in the spring if actuator applies a force of 150 N and
Distances AB=0.4m and BC=0.3m.

Fig. 1
Hydraulic
actuator

2- It is often said, “Build a better mouse trap and the world will beat a path to your door,” Consider this problem and write a goal statement and a set of at least 12 task specifications that you would apply to its solution. Then suggest 3 possible concepts to achieve the goal. Make annotated free hand sketches of the concepts.
3- Compute the bearing stress between the 10.0 mm diameter pin and the mating hole in the link. The force applied to the link is 3550 N. The thickness of the link is 15.0 mm and its width is 25.0 mm.
Also calculate the shear stress in the pin.
4- A 40-N sphere and a 12-N sphere are connected by a light rod 200 mm in length. How far from the middle of the 40-N sphere is the center of gravity?
F12 N40 N200 mmx
F5- A V-belt is wrapped around a pulley 16 in. in diameter. If a resultant torque of 4 lb ft is required, what force must be applied along the belt?
0.4WxF0.6W3.4 mAxis6- A car has a distance of 3.4 m between front and rear axles. If 60 percent of the weight rests on the front wheels, how far is the center of gravity located from the front axle? X=?
7- A circular drum of radius 40 cm is initially rotating at 400 rpm. It is brought to a stop after making 50 revolutions. What was the angular acceleration and the stopping time?
8- Describe factors that affect a designers choice of materials.
9- Describe…