MECH324 - Homework Hints, Answers, and Extra Requirements

Homework 1 (Chapter 2)

TO ENHANCE YOUR LEARNING, PLEASE TRY TO WORK THE PROBLEMS FIRST WITHOUT LOOKING AT THE HINTS AND ANSWERS BELOW.

MAKE SURE YOU SATISFY ALL REQUIREMENTS LISTED BELOW AND IN THE ORIGINAL PROBLEM STATEMENTS (UNLESS INDICATED OTHERWISE BELOW).

NOTE - BECAUSE MOST ANSWERS ARE PROVIDED, IT IS VERY IMPORTANT THAT YOU SHOW ALL STEPS IN YOUR WORK.  THE GRADING WILL BE BASED ON THE COMPLETENESS, CLARITY, AND CORRECTNESS OF YOUR WORK, NOT JUST THE ANSWERS YOU PROVIDE.

2-7
[30 pts]
  • Do Part 1 (a, b, c, d) only.
  • Report the number of links (L), number of full joints (J1), number of half joints (J2), and mobility (M) for each case.

a) M=0
b) M=1
c) M=1
d) M=3

2-15
[20 pts]
  • Do not do the 2nd sentence for homework. This will be done in Lab for various linkage geometries.
  • Do parts a, b, and c.

a) Grashof
b) non-Grashof
c) Grashof

2-22
[30 pts]
  • Report the Grashof condition, and Barker classification (see Table 2-4) for each.
  • As always, show your work.
2-36
[20 pts]
  • Hint: see Section 2.10.
  • Show or explain where the joints of the equivalent linkage are relative to the cam-follower mechanism components.
  • Report the number of links (L), number of full joints (J1), number of half joints (J2), and mobility (M) for both.
  • Assume the follower roller rolls without slipping.
  • Note - The equivalent linkage will mimic the cam-follower motion only instantaneously, for the position shown. The effective link lengths change as the cam turns.