Simulation: http://phet.colorado.edu/en/simulation/wave-on-a-string 3) Apply the
ID: 1837253 • Letter: S
Question
Simulation: http://phet.colorado.edu/en/simulation/wave-on-a-string
3) Apply the following settings to the simulation: Set Wave to Oscillate, End type to No End, Amplitude to 80, Frequency to 40, Damping to 0, and Tension to High. Make sure to check the Rulers and Timer boxes
a) Wavelength (?) = _____ cm
b) Period (T) = _____ s
c) Speed (v) = _____m/s
d) Calculate the tension using the linear density found in step1h. Tension (T) = ___N
e) Which one of the above quantity changed?
4) Can you tell about the setup used from the following graph? Describe all the settings you think applied to get this graph. The period of the wave is 1:11 sec.
5) Apply the following settings to the new simulation: Click Reset button, Set Wave to Pulse, End type to Fixed End, Amplitude to 60, Frequency to 40, Damping to 0, and Tension to High.
a) Click the pulse button and observe the pulse moving through the string.
b) Describe what the wave does as it moves down the string. After it hits the end of the string, what happens to the wave?
6) Click the Reset button. Keep the same settings as in step 5 except set End Type to Loose End
a) Click the pulse button and observe the pulse moving through the string.
b) Describe what the wave does as it moves down the string. After it hits the end of the string, what happens to the wave?
PLEASE ANSWER ALL QUESTIONS, THANKS!
Explanation / Answer
The question paper has multiple questions.
Ans 3
Using the set-up marked in the link: & the settings as suggested:
wave: oscillate
end type: no end
damping = 0
amplitude=80
frequency =40
we find:
wavelength = 14cm
period= 2.46 s
speed v= frequency X wavelength = 0.40 Hz x 14 cm = (0.4 X .14) m/s =0.056 m/s
tension = v^2 / mass per unit length (mu)
as velocity v =sqrt ( tension T / mass per unit length mu)
Using v in m/s and mu in kg/m , tension will be found in N .
the value of mu can be found as suggested in 1h. (it is not given in this question paper).
the quantity which changed: