Problem 4.193 The force F = 60i + 60j (lb).
(a) Determine the moment of F about point A.
(b) What is the perpendicular distance from point A to
the line of action of F?
Solution: The position vector o
Statics ECE210 Take home exam 5
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Statics ECE210 Exam 3
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ECE210
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exam No. 1: Open book, closed notes. It is not permitted to discuss the content of
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Solutions to midterm exam No. 2: (10/4 points each problem).
1. Determine the force and moment reactions at the support A of the built-in beam which i
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Problem 5.142 {a} Draw the free-body diagram of the
50-1b plate, and explain wh)r it is statically indeterminate.
(b) Determine as many of the reactions at A and B as
possible.
Solution:
(:1] Thu: pin
Problem 5.145 (21} Draw the free-body diagram of
the beam.
(b) Determine the reactions at the suppons.
Solution:
[3) The fuse body diagram is shown.
[h] The sum of the moments about 3
EMS =+th0* (141+
Problem 5.2 The beam has a built~in support and is i214
hmdcd by a 2-kN force and a 6 kN-m couple. IlA QT MM]
(:1) Draw the free-bmly diagram of the beam. 3
(1:) Determine lhe reactions at the s
/
Problem 4.208 If you represent the forces exened by
the oor on the table legs by a force F acting at the
origin 0 and a couple M. what are I" and M?
Solution: The sum of the forces is the equivale
Problem 4.201 The two systems are equivalent. Deter-
mine the forces A; and A and the couple MA.
Solution: The sum of the fumes for System I is
2 F; =(21y + 201i.
2 Fr = {Ar + 3U)j.
The sum of forces
Problem 4.188 Determine the moment of the 400-N
force (a) about A. (b) about B.
Solution: Use the two dimensional description of the moment. The
vertical and horizontal components of the 280 N force a
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