1- 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...

1. 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.
Answer
At point A Reaction RA will be resolved in to two parts RAX and RAY similarly at point B and C.
Force can be calculated using equili
ium principle of moments,
150*0.3 = P*0.4
P = 111.5N (Answer)
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 freehand sketches of the concepts.
Answer
Goal Statement: Here we need to build a Mouse Trap with thing in mind It should be Better.
Task Specification:
1. First we need think about its use.
2. What should be the Quantity of the Product.
3. Where should be machinery located.
4. We need to develop concept for building it.
5. What should be its design.
6. What kind of raw material I am going to use in various part.
7. Durability of the Product.
8. Then we need to determine its capacity.
9. Its manufacturing Cost.
10. What should be its Market Cost
11. Marketing Strategies to sell it
12. Further work is to be done to develop it more precisely.
Concepts to achieve Goal:
1. Better Marketing Strategy
2. Competitive Cost
3. Attractive Design and Its Usefulness
Just draw a handmade Flow Chart representing all the above mentioned steps.
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.
Answer
Bearing stress can be calculated as
Given that force applied to the link is 3550N then Pressure can be calculated as,
And Bearing stress is
σ = P/A or = F/A
σ = 3550 / (3.14*0.0052)
σ = 45.22Mpa
Shearing stress will be
?? = P/A = 3550/ 0.015*0.025 = 9.46MPa (Answer)
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
40N sphere is the...