Day 10 
Intro to Engineering
Allen Sam
6-25-18
Activities 5.1, 5.2a, and 5.2b
Activity 5.1






Conclusion:

1.      What is the difference between a circle and an ellipse?

 A circle is an ellipse but with an equal major and minor axis. An ellipse will have two focal points but in a circle the center is the focal point.

2.      What is the difference between an inscribed and a circumscribed shape?

 An inscribed shape is a shape when it is in another shape. A circumscribed shape is a shape that surrounds another shape.

3.      Why is it impossible for a triangle to contain a 180° angle?

 It is impossible for a triangle to have a 180 degree angle because This causes the other two distances in the triangle to match at the tip with interior angles of 0 degree. This forms a line instead of a triangle.

4.      How is a rhombus similar to a square?
A rhombus and a square are similar because the have congruent side lengths but a rhombus can have different angles.
  

5.      What is the difference between a right, acute, and obtuse triangle?
A right triangle is a triangle with a 90 degree angle, an acute triangle is a triangle with at least one angle under 90 degrees, and an obtuse triangle is a triangle that has one angle greater than 90 degrees.


5.2a


Conclusion: 

1.      What is a geometric constraint?
Geometric constraint is a constant, non-numerical relationship between the parts of a geometric figure

2.      What are the different types of geometric constraints that are applied to sketches, and what are their functions?
A perpendicular constraint is a constraint that causes lines or axes of curves to meet at right angles.
A parallel constraint is two or more lines to be equidistant from each other.A tangent constraint is two arcs or a line an arc to intersect at a single pt perpendicular to the arcs radius. Coincident constraints fix two points together or fix a curve. Concentric constraints are two or more arcs or circles to share the same center pt.A Horizontal constraint causes lines to lie parallel to the X axis of the sketch. A co linear constraint is two lines or ellipse to lie along the same line.An Equal forces constraint is line segments to be the same length and arcs or circles to have the same radius. Vertical constraint causes lines to lie parallel to the Y axis of the sketch


3.      Define “tangent”.
a tangent is a place where a point on a shape and another point on a line create perpendicular lines

a.                  Sketch a line tangent to two circles.



b.      Sketch three circles such that all circles are tangent to the other two.



4.   How is a geometric constraint different from a numeric constraint?
A numeric constraint is a number value or algebraic equation that is used to control the geometric figure. A geometric constraint is a non number value is used to control the relationship of the parts to the figure.


Activity 5.2b





Conclusion

1.                        What advantages do CAD sketches have over freehand sketches?
 CAD sketches are very accurate in terms of dimensions and CAD models can create perfect circles. Freehand drawing for circles is very hard, so CAD modeling definitely helps make a sketch become accurate.

2.                              What disadvantages do CAD sketches have when compared to freehand sketches?
On the other hand, freehand sketches can be done anywhere, so if an idea is created a freehand sketch can be made wherever the idea is created. 

3.                              Explain the difference between the Fillet sketch tool and the Fillet placed feature.
 The fillet sketch tool is used to select whether you want a fillet or a chamfer while the fillet placed feature selects what you want to fillet.

4.                              The Fillet placed feature is used to create both a “fillet” and a “round”. Describe the difference between the two results.
 A fillet is in the interior corner of an object while a round, like it sounds, is a fillet but on an exterior corner


5.                              Could the Shell feature be used to create the opening in the Automoblox body passenger section (as in number 2 above)? Explain your answer.
The shell feature can be used to make an opening in the automoblox body passenger section if the right measurement is entered.


















Comments

Post a Comment

Popular posts from this blog

Image
Day 15  Intro to Engineering Allen Sam 7-3-18 Activities 7.3 and 7.4 7.3 Tolerances 1.       Study the drawings below to identify specified tolerances. a.       Highlight each dimension that has a tolerance associated with it using something like a highlight marker. b.       Identify the type of tolerance in each highlighted example by labeling each tolerance dimension with one of the following: limit dimensions, unilateral tolerance, or bilateral tolerance. c.       Label each identified tolerance with a separate letter, A through Z. d.       Beginning on a new page in your engineering notebook for each part, record the letter of each tolerance identified on that part drawing, the type of tolerance, a short written phase that describes the dimensional variation allowed for that dimension, the tolerance (a number representing the total allowed dimensional variation), and an explanation as to why that particular dimension requires a tolerance. You may wish to
Read more
Image
Day 13 Intro to Engineering Allen Sam 6-28-18 Activity 5.6a Aluminum Object Example 1 1.       What is the volume of the part? A.      1.875 in.³ B.      1.125 in.³ C.     1.375 in.³ D.     2.125 in.³ c.1.375                  2.                                                       What is the density of aluminum in grams per cubic centimeter? (This may require research. Be sure to document your source.)  2.700g/cm^3 3.                                           What is the density of aluminum in pounds per cubic inch? Show your work including all conversion factors.    0.0975437 pounds per cubic inch 2.700 x 2.54^3 / 453.592 4.                                           Find the mass of the object (in pounds-mass) if it is made of aluminum. A.      0.125 lb m B.      0.135 lb m C.     0.257 lb m D.     0.312 lb m b. 0.135lb m 5.       What is the surface area of the part? A.      7.250 in.² B.     
Read more
Image
Day 12  Intro to Engineering Allen Sam 6-27-18 Activities 5.5a and 5.5b 5.5a   Conclusion:  1.        What 3D CAD functions could be used to create a wire coat hanger? I would use the sweep, loft, and revolve functions of CAD to create the coat hanger from the front view and a side view. Activity 5.5b \ Conclusion:  1.    What CAD feature would be used to most efficiently model a baseball bat (Extrude, Loft, Revolve, Sweep)? Explain your answer. I would use the revolve tool to create the baseball bat because the baseball bat is cylindrical     2.    How does a 3D CAD solid model program display the progression of work involved in creating a model? You can see progression of the work of a project by showing the constraints and CAD features that were used. 3.    If a mistake is made, how does the user make a correction without using the undo function? The user would either use the delet
Read more