Driving force in simple harmonic oscillator with exponential

In summary, a particle in simple harmonic motion (SHM) with a driving force of F(t)= ma*e^(-jt) and initial position and speed of 0 can be found using the equations F = -kx, dx = mvdv, F(t) = F(0)*e^(iωt), and x(t) = Acos (ωt +φ). The exponential term in the driving force may complicate integration, but taking into account both the elastic and driving forces can result in a solution with the same frequency as the driving force.
  • #1
nacreousnereid
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Homework Statement


A particle in SHM is subject to a driving force F(t)= ma*e^(-jt). Initial position and speed equal 0. Find x(t).

Homework Equations


F = -kxdx = mvdv
F(t) = F(0)*e^(iωt)
x(t) = Acos (ωt +φ)

The Attempt at a Solution


I have no idea how to deal with the exponential term. I know I can put the t in e^(-jt) in terms of v, but that makes integration awfully messy. Any tips? Thanks!
 
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  • #2
There are two forces here: the elastic force and the driving force. When you write Newton's second law you need to include both.
-Kx+F(t)=ma

This will result in a non-homogeneous second order differential equation.
A possible solution will be an oscillation with the same frequency as the driving force's frequency.
 

Related to Driving force in simple harmonic oscillator with exponential

1. What is the driving force in a simple harmonic oscillator with exponential?

The driving force in a simple harmonic oscillator with exponential is a force that acts on the oscillator and causes it to deviate from its equilibrium position. This force is typically described by an exponential function, which represents the rate of change of the oscillator's displacement over time.

2. How does the driving force affect the motion of a simple harmonic oscillator with exponential?

The driving force affects the motion of a simple harmonic oscillator with exponential by causing it to oscillate with a different amplitude and frequency than it would without the force. The amplitude and frequency are determined by the magnitude and direction of the driving force, respectively.

3. Can the driving force be negative in a simple harmonic oscillator with exponential?

Yes, the driving force can be negative in a simple harmonic oscillator with exponential. This would cause the oscillator to move in the opposite direction of the force, resulting in a decrease in amplitude and a change in frequency.

4. How is the driving force related to the potential energy in a simple harmonic oscillator with exponential?

The driving force is directly related to the potential energy in a simple harmonic oscillator with exponential. The potential energy is defined as the negative of the integral of the driving force with respect to displacement. This relationship allows us to calculate the potential energy at any point in the oscillator's motion.

5. How can the driving force be calculated in a simple harmonic oscillator with exponential?

The driving force in a simple harmonic oscillator with exponential can be calculated using the equation F = -kx, where F is the force, k is the spring constant, and x is the displacement from equilibrium. If the oscillator is subject to other forces, such as friction, these must also be taken into account in the calculation of the driving force.

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