Calculus-Based Physics by Jeffrey W. Schnick - HTML preview

Chapter 23 Statics

Example 23-1

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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