One end of a beam of mass 6.92 kg and of length 2.00 m is pin-connected to a
wall. The other end of the beam rests on a frictionless floor at a point that is
1.80 m away from the wall. The beam is in a plane that is perpendicular to both
the wall and the floor. The pin is perpendicular to that plane. Find the force
exerted by the pin on the beam, and find the normal force exerted on the beam
by the floor.
Solution
First let’s draw a sketch:
•
L = 2.00 m
x = 1.80 m
Now we draw a free body diagram of the member:
F Py
F
Px
O
F
F
g
N
1
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