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Simple Harmonic Motion Discrepancy

  • Thread starter wesDOT
  • Start date
28
0
1. Homework Statement

A body oscillates with simple harmonic motion along the x-axis. Its displacement varies with time according to the equation x = 5 sin(πt + π/3) meters. The acceleration in m/s2 of the body at t = 1 second is approximately


2. Homework Equations
The harmonic motion ones I guess.


3. The Attempt at a Solution

I dont think I have done anything wrong. Since acceleration is d2x/dt2, i found the second derivative of the equation given which is a=(-pi)^2)*(5)(sin(pi*t + (pi/3)). I plug in 1 for t and get approximately 3.6. If the answer was 3.5 and lower i would just round down, but im not sure.

my answer choices are 3, 49, 14, 43 and 4.3.
 
28
0
never mind, my calculator was in degree mode, not radian.
 

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