Key for Waves Unit II, Worksheet 3
Questions 1-4 show pulses A and B at time = 0 as they head toward each other. Each pulse travels at a constant speed of 2 squares per second
on a string which is 16 squares long. For questions 1-4, at t = 1 s, 2 s, 3 s, and 4 s, show the position of pulse A in red and pulse B in blue.
Using the principle of superposition, show the resultant displacement of the string in green.
1.
2.
t=0
B
A
A
B
3.
4.
A
A
B
B
t = 1s
t = 2s
t = 3s
t = 4s
©Modeling Workshop Project 2004
1
W2, Mechanical Waves in 1D, WS 3 Key, v3.2
Questions 5 - 8 show pulses A and B at time = 0 as they head toward each other at the same constant speed of 1 square per second. The string
which is 16 squares long. For questions 5 - 8, at t = 3 s, 4 s, 5 s, and 6 s, show the position of pulse A in red and pulse B in blue. Using the
principle of superposition, show the resultant displacement of the string in green.
5.
6.
A
t=0
7.
B
A
B
8.
A
B
A
B
t = 3s
t = 4s
t=5s
t = 6s
©Modeling Workshop Project 2004
2
W2, Mechanical Waves in 1D, WS 3 Key, v3.2
Questions 9 – 16 show pulses A and B as they head toward each other. On the graph below each situation, show the position of pulse A (in
red) and pulse B (in blue) at the instant the centers of the pulses overlap. Using the principal of superposition, show the resultant
displacement of the string in green.
9.
10.
11.
12.
13.
14.
15.
16.
©Modeling Workshop Project 2004
3
W2, Mechanical Waves in 1D, WS 3 Key, v3.2