Position of a particle is given by x = (2 cm) cos 10πt

In summary, the position of a particle is given by x = (2 cm) cos 10πt, where t is in seconds. The frequency is measured in Hz, the period in seconds, and the amplitude in cm. The first time after t = 0 that the particle is at its equilibrium position is at t = 0.25 seconds, and it is moving in the negative direction at that time. The general form of the equation used is x = ACos(ωt), where x is the displacement, A is the amplitude, and ω is the angular frequency.
  • #1
laser123
21
0

Homework Statement



The position of a particle is given by x = (2 cm) cos 10πt, where t is in seconds.
(a) What is the frequency?
Hz
(b) What is the period?
s
(c) What is the amplitude of the particle's motion?
cm
(d) What is the first time after t = 0 that the particle is at its equilibrium position?
sIn what direction is it moving at that time?
in the negative direction
in the positive direction

Homework Equations





The Attempt at a Solution

 
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  • #2


The general form of the equation you are using is
x = ACos(ωt)
x is the displacement, A is the amplitude and ω is the ANGULAR frequency
Hope this helps
 
  • #3


You will need to show some working first, where are you having problems and what have you done so far?
 

1. What is the position of the particle at a given time?

The position of the particle is given by the equation x = (2 cm) cos 10πt, where t represents time in seconds. To find the position at a specific time, simply plug in the value for t into the equation and solve for x.

2. What does the coefficient 2 cm represent in the equation?

The coefficient 2 cm represents the amplitude or maximum displacement of the particle from its equilibrium position. This means that the particle's position oscillates between 2 cm and -2 cm as time passes.

3. How does the frequency of the particle's motion relate to the equation?

The frequency of the particle's motion is represented by the coefficient 10π in the equation. This indicates that the particle completes 10 full oscillations in one second.

4. Can this equation be used to predict the future position of the particle?

Yes, this equation can be used to predict the future position of the particle as long as time is known. By plugging in a value for t, the resulting value for x will represent the position of the particle at that time.

5. How can this equation be graphically represented?

This equation can be graphically represented as a sinusoidal wave, where the x-axis represents time and the y-axis represents the position of the particle. The amplitude, frequency, and phase shift can be identified from the graph.

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