Question

A nonuniform beam 4.44 m long and weighing 1.10 kN makes an angle of 25 ? below the horizontal. It is held in position by a frictionless pivot at its upper-right end and by a cable a distance of 3.02 m farther down the beam and perpendicular to it (see Figure 11.31 in the textbook). The center of gravity of the beam is a distance of 2.04 m down the beam from the pivot. Lighting equipment exerts a downward force of 5.03 kN on the lower-left end of the beam.

Q1: Find the tension *T* in the cable.

Q2: Find the vertical component of the force exerted on the beam by the pivot.

-Assume that the positive x and y axes are directed to the right and upward respectively.

Q3: Find the horizontal component of the force exerted on the beam by the pivot.

-Assume that the positive x and y axes are directed to the right and upward respectively.

Answer #1

A nonuniform beam 4.45 m long and weighing 1.08 kN makes an
angle of 25 ∘ below the horizontal. It is held in position by a
frictionless pivot at its upper-right end and by a cable a distance
of 3.06 m farther down the beam and perpendicular to it (see Figure
11.31 in the textbook). The center of gravity of the beam is a
distance of 1.97 m down the beam from the pivot. Lighting equipment
exerts a downward force...

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the figure below). The beam is uniform, weighs 200 N, and is 5.00 m
long, and it is supported by a wire at an angle of θ =
60.0°. The basket weighs 80.0 N.
A horizontal plank is attached at the left end to a vertical
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A 1,100–N uniform boom at ϕ = 65.5° to the horizontal
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from its top.
(a) Find the tension in the support cable.
(b) Find the horizontal & vertical components of the
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positive...

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N
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ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
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.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

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