Question

Find a model for simple harmonic motion if the position at t=0 is 5 centimeters, the amplitude is 5 centimeters, and the period is 4 seconds.

Answer 1

I think a cosine model would be easiest.

Answer 2

Do you know how to find the period of a cosine function?

Answer 3

Ya. I know the model is either d=5cos(pi/2t) or d=5sin(pi/2t). I just could't figure out whether to use cos or sin

Answer 4

Either one will work, but cosine is simpler (doesn't require a phase shift).

Answer 5

k, thank you very much

Answer 6

No prob'