Answer to Question #169974 in Physics for Jessica

Question

A travelling wave is created on a string. The graph below shows the variation with time t of the displacement y of a particular point on the string.

Graph1 y/mm 2.0 1.0

0.00.0  0.5 t / ms –1.0

–2.0

The variation with distance x of the displacement y of the string at t = 0 is shown below.

 0.1

0.2

0.3

0.4

                                   (a)

Use information from the graphs to calculate, for this wave,

Graph2 y/mm 2.0 1.0

0.00.0 5.0 x / cm –1.0

–2.0

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave.

The wave is moving from left to right and has period T.

(i) On graph 1, draw a labelled line to indicate the amplitude of the wave.

(ii) On graph 2, draw arrows to indicate the direction of motion of the points at x = 2.0 cm and x = 3.0 cm.

(iii) On graph 2, draw the displacement of the string at t = T4 .

  1.0

2.0

3.0

4.0

                                   (b)

 

(c)

One end of the string is attached to a wall. A student creates a single pulse in the string

Answer 1

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