**position of cart !**
The position of a an air-track cart that is oscillating on a spring is given by (18.0cm)cos[(18.0s^-1)t].
At what value t after t=0 is the cart first located at x=14.6 cm?
Hint: Make sure your calculator is in radian mode.
i've tried
14.6 cm = (18.0cm)cos[(18.0s^-1)t
t= 14.6/[(18.0cm)cos[(18.0s^-1)]
= 0.54
but its wrong.
what did i do wrong?
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Last edited by christina; Dec 5th 2009 at 03:55 PM.
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