A continuous sinusoidal longitudinal wave is sent along a very long coiled spring from an attached oscillating source. The wave travels in the negative direction of an x axis; the source frequency is 25 Hz; at any instant the distance between successive points of maximum expansion in the spring is 24 cm; the maximum longitudinal displacement of a spring particle is 0.30 cm; and the particle at x = 0 has zero displacement at time t = 0. If the wave is written in the form s ( x , t ) = s m cos( kx ± ωt ), what are (a) s m , (b) k , (c) ω , (d) the wave speed, and (e) the correct choice of sign in front of ω ?
A continuous sinusoidal longitudinal wave is sent along a very long coiled spring from an attached oscillating source. The wave travels in the negative direction of an x axis; the source frequency is 25 Hz; at any instant the distance between successive points of maximum expansion in the spring is 24 cm; the maximum longitudinal displacement of a spring particle is 0.30 cm; and the particle at x = 0 has zero displacement at time t = 0. If the wave is written in the form s ( x , t ) = s m cos( kx ± ωt ), what are (a) s m , (b) k , (c) ω , (d) the wave speed, and (e) the correct choice of sign in front of ω ?
A continuous sinusoidal longitudinal wave is sent along a very long coiled spring from an attached oscillating source. The wave travels in the negative direction of an x axis; the source frequency is 25 Hz; at any instant the distance between successive points of maximum expansion in the spring is 24 cm; the maximum longitudinal displacement of a spring particle is 0.30 cm; and the particle at x = 0 has zero displacement at time t = 0. If the wave is written in the form s(x, t) = sm cos(kx ± ωt), what are (a) sm, (b) k, (c) ω, (d) the wave speed, and (e) the correct choice of sign in front of ω?
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
Request Answer
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°-
The 10-lb weight is supported by the cord AC and roller and by the spring that has a stiffness of k = 10 lb/in. and an
unstretched length of 12 in. as shown in.
Part A
Determine the distance d to maintain equilibrium.
Express your answer in inches to three significant figures.
節
ΕΠΙ ΑΣΦ
d =
*k
J
vec
5
t
0
?
d
C
A
in.
12 in.
B
The members of a truss are connected to the gusset plate as shown in
. The forces are concurrent at point O. Take = 90° and T₁ = 7.5 kN.
Part A
Determine the magnitude of F for equilibrium.
Express your answer to three significant figures and include the appropriate units.
F =
Value
Submit
Request Answer
Part B
0
?
Units
Determine the magnitude of T2 for equilibrium.
Express your answer to three significant figures and include the appropriate units.
?
T₂ =
Value
Units
T₁
C
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