A person is in a closed room (a racquetball court) with v = 453 m 3 hitting a ball (m 42.0 g) around at random without any pauses. The average kinetic energy of the ball is 2.30 J. (a) What is the average value of v x 2 ? Does it matter which direction you take to be x ? (b) Applying the methods of this chapter, find the average pressure on the walls? (c) Aside from the presence of only one "molecule" in this problem, what is the main assumption in Pressure, Temperature, and RMS Speed that does not apply here?
A person is in a closed room (a racquetball court) with v = 453 m 3 hitting a ball (m 42.0 g) around at random without any pauses. The average kinetic energy of the ball is 2.30 J. (a) What is the average value of v x 2 ? Does it matter which direction you take to be x ? (b) Applying the methods of this chapter, find the average pressure on the walls? (c) Aside from the presence of only one "molecule" in this problem, what is the main assumption in Pressure, Temperature, and RMS Speed that does not apply here?
A person is in a closed room (a racquetball court) with
v
=
453
m3 hitting a ball (m 42.0 g) around at random without any pauses. The average kinetic energy of the ball is 2.30 J. (a) What is the average value of
v
x
2
? Does it matter which direction you take to be x ? (b) Applying the methods of this chapter, find the average pressure on the walls? (c) Aside from the presence of only one "molecule" in this problem, what is the main assumption in Pressure, Temperature, and RMS Speed that does not apply here?
The shear leg derrick is used to haul the 200-kg net of fish onto the dock as shown in. Assume the force in each leg acts along
its axis.
5.6 m.
4 m-
B
Part A
Determine the compressive force along leg AB.
Express your answer to three significant figures and include the appropriate units.
FAB =
Value
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Part B
Units
?
Determine the compressive force along leg CB.
Express your answer to three significant figures and include the appropriate units.
FCB=
Value
Submit
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Part C
?
Units
Determine the tension in the winch cable DB.
Express your answer with the appropriate units.
2m
Part A
(Figure 1) shows a bucket suspended from a cable by means of a small
pulley at C.
If the bucket and its contents have a mass of 10 kg, determine the location of the pulley for equilibrium. The cable is 6 m long.
Express your answer to three significant figures and include the appropriate units.
Figure
4 m
B
НА
x =
Value
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<
1 of 1
T
1 m
Units
?
The particle in is in equilibrium and F4 = 165 lb.
Part A
Determine the magnitude of F1.
Express your answer in pounds to three significant figures.
ΑΣΦ
tvec
F₁ =
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Part B
Determine the magnitude of F2.
Express your answer in pounds to three significant figures.
ΑΣΦ
It vec
F2 =
Submit
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Part C
Determine the magnitude of F3.
Express your answer in pounds to three significant figures.
?
?
lb
lb
F₂
225 lb
135°
45°
30°
-60°-
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