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t1spng03sol

# t1spng03sol - PHYSICS 2306 TEST#1 14 February 2003 2:30 PM...

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1. Two sinusoidal transverse traveling waves are moving in opposite directions along the x-axis. They have the same wavelength and frequency, and each has a maximum amplitude of A. The condition on each of the waves is that at x = 0 when t = 0, the disturbance of each is +A. The combined disturbance for both traveling waves at x = 0 when t = T/4, where T is the period of each traveling wave, is: Since each piece of string describes simple harmonic motion, if they are fully up at t = 0, then at T/4 they are both going through equilibrium. Therefore, 0 + 0 = 0. (1) -2A (2) -A (3) 0 (4) +A/2 (5) +A (6) +2A 2. Two identical triangular-shaped wave pulses (isosceles triangles) approach each other from opposite directions. They each have the same speed relative to the ground, and their individual widths are 0 . 4 m each (base of the triangle). After 3 seconds the net disturbance is shown in the bottom picture[see below]. The speed of each pulse is about: Since the two pulses move at the same speed, their peaks will overlap when each has moved 1 meter.
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t1spng03sol - PHYSICS 2306 TEST#1 14 February 2003 2:30 PM...

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