Homework Help: Physic

Posted by Tory on Sunday, April 4, 2010 at 11:45pm.

A mass attached to a spring oscillates with a period of 3.15 s.
If the mass starts from rest at x = 0.0530 m and time t = 0, where is it at time t = 6.69 s?

I found online that you use the equation x = Acos(2pi*t/T) where A is the amplitude, t is 6.69s and T is 3.15s but I keep getting the wrong answer so I dont know if Im just plugging it in wrong or not. The answer I got was 0.05156m

Physic - Tory, Monday, April 5, 2010 at 12:17am
Nevermind! I just forgot to change from degrees to radians on my calculator
Physic - drwls, Monday, April 5, 2010 at 1:40am
Well done! Thanks for letting us know :)

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