Which of the following graphs shows the kinetic energy K of the particle as a function of time t for one cycle of motion?
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Ответ:
Part(a): The frequency is
.
Part(b): The speed of the wave is
.
Explanation:
Given:
The distance between the crests of the wave,
.
The time required for the wave to laps against the pier,![t = 5.0~s](/tpl/images/0600/9950/78375.png)
The distance between any two crests of a wave is known as the wavelength of the wave. So the wavelength of the wave is
.
Also, the time required for the wave for each laps is the time period of oscillation and it is given by
.
Part(a):
The relation between the frequency and time period is given by
Substituting the value of
in equation (1), we have
Part(b):
The relation between the velocity of a wave to its frequency is given by
Substituting the value of
and
in equation (2), we have