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Smartphone

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Conceptual Questions
Read Ch. 1 in text and answer the following questions.

1. What is this class about? Why is it important in an engineering education?

Static concerns itself on how rigid bodies perform its function while forces and force systems are acting on it.

2. What is a rigid body? Why is this an important assumption in Statics?

A rigid body is a solid body that can be parts of a structure or machine that are perfectly rigid and do not deform, even under large forces. This is important because Statics deal primarily with the calculation of external forces which act on rigid bodies in equilibrium.

3. Describe 3 real world examples of statics that might require engineering analysis. At least one example should be an object moving under constant velocity. Include an explanation of why the analysis is needed. Try to think beyond examples in the book.

Skyscrapers will requires engineering analysis on steel beam loads, rivets, and truss and floor systems. There is allot of forces acting on rigid bodies in relationship to height. Analyzing this can help engineers design foundations to support ever record breaking heights. Wind acts as force. Engineers need to understand how rigid components are affected by wind at various speeds.

A hoist requires engineering analysis to determine the maximum load it can lift. To heavy and the hoist can break.

Rigid components in a spacecraft are subjected to thrust forces at launch. Allot of engineering analysis is required so a spacecraft do not break apart during launch. Also forces applied to a spacecraft on return flights entering our earth atmosphere and how those forces act on it. 4. What type(s) of triangles is Pythagorean Theorem and sine, cosine, and tangent used for?

Right Triangles

5. What type(s) of triangles can Law of Sines and Law of Cosines be used for?

Oblique Triangles

6. Review Example 1.5, what are two ways to solve simultaneous equations?

(1) Using algebraic solution method to eliminate one unknown (2) Using substitution method to solve one equation for one of the variables

7. How is a significant digit related to the accuracy of a measurement?

The more significant digit the higher the accuracy of the measurement.

8. Which is more precise, 4.78 or 0.00478?

0.00478 is the most precise because 0.00001 is smaller unit of measure than 0.01

9. What is the purpose of a dimensional analysis?

Dimensional analysis or being in the same dimension refers to a procedure where in math you are in the correct units. For example you can add two distances but you cannot add distance and time because they are two different dimensions or different units.

10. What is the difference between weight and mass?

Weight of an object is a measure of the gravitational force or pull acting on it.
Mass of an object is the quantity of material making up the object.

Grade: __________ / 10 points

Document any questions you have:

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