Free Printable Lesson II

Worksheets

Lesson II

Total questions: 12

Worksheet time: 15mins

Name

Class

Date

The two main types of waves are...................and........................

transverse wave, longitudinal wave.

mechanical waves ,electromagnetic waves.

do not require some medium, do not require a medium

"As the pulse travels, each disturbed element of the string moves in a direction perpendicular to the direction of propagation" What does the purport mean ?

longitudinal wave

transverse wave

mechanical wave

At time t, the shape of the pulse is the same as it was at time t = 0 ,an element of the string at x . At this time if the pulse travels to the left. Can you show me the wave function describes the transverse position y of the element.

$y\left(x,t\right)=x-vt$

$y\left(x,t\right)=x+vt$

A sinusoidal wave traveling in the positive x direction has an amplitude of 15.0 cm, a wavelength of 40.0 cm, and a frequency of 8.00 Hz. The vertical position of an element of the medium at t = 0 and x = 0 is also 15.0 cm. Determine the phase constant and write a general expression for the wave function.

$\phi=0$ $y=15\sin(15.7x-50.3t)$

$\phi=1$ $y=0.150\cos(15.7x-50.3t)$

$\phi=\frac{\pi}{2}$ $y=0.150\cos(15.7x-50.3t)$

$y=0.15\sin(0.80x-50t)$

A sinusoidal wave on a string is described by this the wave functionwhere x and y are in meters and t is in seconds. The mass per unit length of this string is 12.0 g/m. Determine (a) the speed of the wave, (b) the wavelength,(c) the amplitude.

50 m/s, 1.25m, 0.8 m

62.5m/s, 1.25m,0.15m

62.5m/s, 0.8m, 0.15m

The amplitude of a wave is doubled, with no other changes made to the wave. As a result of this doubling, which of the following state- ments is correct?

The speed of the wave changes.

The frequency of the wave changes.

The maximum transverse speed of an element of the medium changes.

Statements (a) through (c) are all true.

what will happen, when a pulse traveling on a string that is rigidly attached to a support at one end.

that the reflected pulse is inverted.

that the reflected pulse is not inverted.

the energy in the incident pulse is reflected and part undergoes transmission.

When a wave or pulse travels from medium A to medium B and v_A>v_B,which one is correct?

mass per unit length of the string A over than B

the density of the string A denser than B

the density of the string B denser than A

Which of the following, taken by itself, would be most effective in decreasing the rate at which energy is transferred by a wave traveling along a string?

reducing the linear mass density of the string

doubling the wavelength of the wave

rise the tension in the string

reducing the amplitude of the wave by one half

10.

What's happen, if the string is to transfer energy at a rate of 1,000 W to 4,000W ? What must be the required angular frequency if angular frequency =80 rad/s and all other parameters remain the same?

80 rad/s

1600 rad/s

40 rad/s

160 rad/s

11.

Which of the following statements is not necessarily true regarding mechanical waves?

The wave speed depends on the properties of the medium in which they travel.

They are sinusoidal in nature.

They carry energy.

They require a medium through which to propagate.

12.

Can a wave on a string move with a wave speed that is greater than the maximum transverse speed v_y,maxof an element of the string?

Can

Can not

100 %

Lesson II

Total questions: 12

Worksheet time: 15mins

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