Asked Nov 18, 2019

In the figure below is shown a picture of a string at a time t1. The pieces of the string are each moving with velocities which are indicated by arrows in the picture. (The vertical displacements are small and don't show up in the picture.)

Below are shown five graphs which could give the shape of the string at the instant for which the velocities are displayed above. (Note: the vertical scale magnifies the displacement by a factor of 100.)

For each of the cases A - E choose whether the string that has that position graph and the velocity pattern at the top is moving as a: (L) left-traveling wave (R) right traveling wave (S+) a standing wave increasing in amplitude (S-) a standing wave decreasing in amplitude (N) none of the above.

1. For graph A: ---Select--- L R S+ S- N

2. For graph B: ---Select--- L R S+ S- N

3. For graph C: ---Select--- L R S+ S- N

4. For graph D: ---Select--- L R S+ S- N

5. For graph E: ---Select--- L R S+ S- N

х (m)
х (m)
х (m)
x (m
у (cm)
е ш
у (cm)

Image Transcriptionclose

х (m) х (m) х (m) x(m x (m (шә) (шә) у (cm) е ш у (cm)


Expert Answer

Step 1

To find the answers we simply look at the velocity profile and impose it on the position graphs to find the infinitesimal displacement in a small interval of time. We can see that,

1. For graph A the positions of troughs and peaks will remain stationary while the amplitude will decrease. Therefore we will have a standing wave with decreasing amplitude that is S-.

Step 2

2. For graph B a peak rises at 1/4 the wavelength and a trough will form at 3/4 the wavelength. Therefore we will have a wave travelling to the right that is R.

3. For graph C we will have a peak forming at 1/4 the wavelength and a trough forming at 3/4th the wavelength. Therefore we will have a wave travelling to the left. That is L.


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: A block of mass 2.00 kg is placed against a horizontal spring of constant k = 775 N/m and pushed so ...

A: (a) the elastic potential energy is given by,


Q: A block of mass  m = 2.50 kg  is pushed  d = 3.00 m  along a frictionless horizontal table by a cons...

A: Click to see the answer


Q: A large cruise ship of mass 6.80 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) What is the s...

A: (a). kinetic energy of ship is


Q: A circular pizza of radius R has a circular piece of radius R/2 removed from one side as shown in th...

A: Write the expression for center of gravity.


Q: 106. The magnitude of the gravitational force that object A exerts on object B is 20. newtons If the...

A: Write the expression for gravitational force .


Q: A block of mass  m = 5.5 kg  is pulled up a  θ = 22°  incline as in the figure below with a force of...

A: The below diagram represents the free body diagram of the block .


Q: A sample of lead has a mass of 0.75 kg (lead has a specific heat of 130 J/kgK). The sample is initia...

A: GivenMass = 0.75kgSpecific heat = 130J/kgKT1=18CT2=74C


Q: A copper vat is 16 m long at room temperature (20°C). How much longer is it when it contains boiling...

A: The change in length is


Q: spring has a rest length of 0.50 m. 0.414 J of energy are used to stretch the spring to a length of ...

A: Initial position of the spring (x1),Final position of the spring (x2),The displacement of the spring...