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## Homework Statement

Another SHM question. Thanks for the help on my first one.

The block is at x

_{0}= +5 cm with a positive velocity V

_{0}at time t = 0. Its motion is SHM with amplitude 10 cm and period 2 seconds. If x(t) = Acos(wt + [tex]\varphi[/tex]), the phase constant [tex]\varphi[/tex] should be:

## Homework Equations

x(t) = Acos(wt + [tex]\varphi[/tex])

## The Attempt at a Solution

0.05 = 0.10cos([tex]\pi[/tex] + [tex]\varphi[/tex])

[tex]\varphi[/tex] = 60 - [tex]\pi[/tex] (since the 60 is in degrees...do I just use pi radians = 3.14 radians?)

= 57 degrees

I got the pi for wt this way btw:

wT = 2pi

w = 2pi/T = pi (since T = 2)

Not sure if I screwed up that or the radians/degrees thing at the end. Any help would be appreciated.