- #1
blackbyron
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Homework Statement
A mass 0.82kg is attached to a spring of constant 205N/m. The mass slides along a horizontal frictionless surface. The spring is compressed a distance 12.2cm from its equilibrium position and the mass is released from rest. How long after it is released will the mass be at x=-1cm for the first time?
Homework Equations
x(t) = A*cos([tex]\omega[/tex]*t+[tex]\phi[/tex])
E = (1/2)(k)(A)^2 = (1/2)(k)(x^2) + (1/2)(m)(v^2)
The Attempt at a Solution
I'm having trouble finding out time. I tried to solve for max velocity and solve for regular velocity, but sadly it didn't work.
I also let A = .122m when t = 0.
I know that the equilibrium position is zero, but are they asking me to find out the time between equilibrium position and -1cm? If it is, does that mean, A = -1cm?
Thanks,
I spend hours trying to do some research on it, even I look at my teachers notes.