# Simple Harmonic motion-graphs

1. Jan 14, 2008

### physks4dumies

1. The problem statement, all variables and given/known data

Using the acceleration as a function of time graph, we are required to sketch the position as function of time graph

2. Relevant equations
I know that the position vs. time graph is a cosine wave and the aforementioned is a sine wave. I have NO idea how to start considering there are no numbers involved.

3. The attempt at a solution

I tried to plot the point of the a vs time graph corresponding to the position...only 1/4 back. In the end, i got a graph that looked EXACTLY like the first. help?

2. Jan 14, 2008

### rock.freak667

if $a=-\omega^2 x$

it is possible to write x as a function of time....$x=x_0 sin(\omega t)$

3. Jan 14, 2008

I think this is meant to be in variables.

so given the definition of the cosine graph, we know the amplitude and the period.

4. Jan 15, 2008

### physks4dumies

well since the a vs t graph is a cosine function, wouldn't the x vs. t graph be a negative cosine function? (basically the same thing--inverted?)

5. Jan 15, 2008

### DylanB

correct, though not entirely. the position graph will be adjusted by some constant. take a look at rockfreaks equation, what is it?

6. Jan 15, 2008

### physks4dumies

ooh i understand it now! Thanks eeryone