Posted by veena on Friday, August 3, 2012 at 11:21am.
A body oscillates with simple harmonic motion along the xaxis. Its displacement varies with time according to the equation x=5 sin (PIE + PIE/3). The velocity (in m/s) of the body at t=1 second is:

physics  MathMate, Friday, August 3, 2012 at 11:30am
There's probably a typo, you probably meant to post
x(t)=5 sin (π + πt/3)
The velocity is the derivative of x with respect to time, giving:
velocity=x'(t)=5(π/3)cos(π+πt/3)
Substitute t=1 in x'(t) to get the velocity at t=1.
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