ME 352  Machine Design I
Name of Student__
_________________________
Spring Semester 2011
Lab Section Number
________________________
Homework No. 5 (30 points).
Due at the beginning of lecture on Monday, February 21st.
Consider the slidingblock linkage shown in Example 2.5, Figure 2.24, page 77, and repeated
here as Figure 1. The length of the ground link is
1
4
2
R
O
O
9 inches
=
=
and the length of link 2
is
2
2
R
O
A
4.5 inches.
=
=
The position solution for the input angle
o
2
135
θ
=
can be obtained
from trigonometry and the answers are
34
4
R
O
A
12.59 inches
=
=
and
.
o
34
3
4
104.64
θ
= θ
= θ
=
The angular velocity and the angular acceleration of the input link 2 are
2
5 k rad
s
ω
= −
/
and
2
2
10 k rad
s ,
α
=
/
respectively. The length of link 4 is
4
O
C
20 inches
=
and note that the origin
of the XY reference frame is now chosen to be coincident with the ground pin O
2
, see Figure 1.
Part A.
Use the vector loop approach to determine the firstorder kinematic coefficients and the
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 Spring '08
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 Machine Design, Velocity, kinematic coefficients

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