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PROBLEM 4.94
A
48-ft
sheet of plywood weighing 34 lb has been
temporarily placed among three pipe supports. The lower
edge of the sheet rests on small collars at A and B and its
upper edge leans against pipe C. Neglecting friction at all
surfaces, determine the reactions at A, B, and C.
PROBLEM 4.95
A 250 × 400-mm plate of mass 12 kg and a 300-mm-diameter
pulley are welded to axle AC that is supported by bearings at A and
B. For
= 30°, determine (a) the tension in the cable, (b) the
reactions at A and B. Assume that the bearing at B does not exert
any axial thrust.
PROBLEM 4.96
Solve Prob. 4.95 for
= 60°.
PROBLEM 4.95
A 250 × 400-mm plate of mass 12 kg and a
300-mm-diameter pulley are welded to axle AC that is supported
by bearings at A and B. For
= 30°, determine (a) the tension in
the cable, (b) the reactions at A and B. Assume that the bearing at
B does not exert any axial thrust.
PROBLEM 4.97
The 20 × 20-in. square plate shown weighs 56 lb and is
supported by three vertical wires. Determine the tension in
each wire.
PROBLEM 4.98
The 20 × 20-in. square plate shown weighs 56 lb and is
supported by three vertical wires. Determine the weight and
location of the lightest block that should be placed on the
plate if the tensions in the three wires are to be equal.
PROBLEM 4.99
An opening in a floor is covered by a 1 1.2-m sheet of
plywood of mass 18 kg. The sheet is hinged at A and B and
is maintained in a position slightly above the floor by a
small block C. Determine the vertical component of the
reaction (a) at A, (b) at B, (c) at C.
PROBLEM 4.100
Solve Problem 4.99, assuming that the small block C is
moved and placed under edge DE at a point 0.15 m from
corner E.
PROBLEM 4.99
An opening in a floor is covered by a
11.2-m sheet of plywood of mass 18 kg. The sheet is
hinged at A and B and is maintained in a position slightly
above the floor by a small block C. Determine the vertical
component of the reaction (a) at A, (b) at B, (c) at C.
PROBLEM 4.101
Two steel pipes AB and BC, each having a mass per unit
length of 8 kg/m, are welded together at B and supported
by three wires. Knowing that
0.4 m,a
determine the
tension in each wire.
PROBLEM 4.102
For the pipe assembly of Problem 4.101, determine (a) the
largest permissible value of a if the assembly is not to tip,
(b) the corresponding tension in each wire.
PROBLEM 4.102 (Continued)
DA
D
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