Ok. I tried first to solve the equation for t before putting in any numeric values. Every time I would do that, though, I'd get the same equation.
x=A*cos(w*t)
x/A=cos(w*t)
From here, I assumed that the next logical step would be to take the inverse cosine of (x/A)
cos^{-1}(x/A)=w*t...
Homework Statement
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27cm and a frequency of 2.55Hz. How long does it take to travel 11.43cm?
Homework Equations
x=A*cos(w*t)
w=2\pi*f
w=2\pi/T
T=1/f
The Attempt at a Solution
I can't...