Solving Rectilinear Motion: Find Velocity & Position

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SUMMARY

The discussion focuses on solving rectilinear motion for a particle of mass m, starting from rest at x=t=0, under the influence of a force function F=Fosin(ct). The derived equations for velocity and position as functions of time t are v=(Fo/cm)(1-cos(ct)) and x=(Fo/mc^2)(ct-sin(ct)), respectively. The solution process involves applying Newton's second law, integrating to find velocity, and then integrating again to determine position. The final expressions ensure the particle is at rest at the initial time t=0.

PREREQUISITES
  • Newton's Second Law of Motion
  • Integration techniques in calculus
  • Understanding of harmonic motion
  • Basic concepts of force and mass
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  • Study the derivation of motion equations under varying force functions
  • Explore advanced integration techniques for solving differential equations
  • Learn about harmonic oscillators and their applications
  • Investigate the effects of different force functions on particle motion
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Homework Statement



Find velocity and position as functions of time t for a particle of mass m, which starts from rest at x=t=0, subject to the following force functions.

a) F=Fosin(ct)


Homework Equations



F=ma

The Attempt at a Solution



a) a=Fosin(ct)/m

dv/dt = Fosin(ct)/m

∫dv = ∫Fosin(ct)/m dt

v = -Fo(cos(ct))/mc

integrate again

x+ Fo(sin(ct))/(mc^2)


This solutions manual says the answer is
v=(Fo/cm)(1-cos(ct)
x=(Fo/mc^2)(ct-sin(ct))
 
Physics news on Phys.org
Look at your expression for v(t), remember that you want it to be at rest at t=0.
 
I understand now, thanks
 

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