You are Here: Home

# SHM graph

Announcements Posted on

1. If I am asked to draw an acceleration-time graph, using the graph shown in the picture, would the acceleration-time graph be a sine curve or cosine curve?
2. I don't understand the question.
The graph shown is acceleration-time. It's a straight line because acceleration is directly proportional to displacement.

Edit: Sorry. Misread the question. See my 2nd answer with stronger lenses!
3. (Original post by Stonebridge)
I don't understand the question.
The graph shown is acceleration-time. It's a straight line because acceleration is directly proportional to displacement.
thats an acceleration vs displacement
4. (Original post by osake)

If I am asked to draw an acceleration-time graph, using the graph shown in the picture, would the acceleration-time graph be a sine curve or cosine curve?
im waiting on stonebridges reply cus i need the answer aswell, and charge ur laptop btw..battery dying lol!
5. (Original post by Z.93)
thats an acceleration vs displacement
I think I need a new pair of glasses.
6. (Original post by osake)

If I am asked to draw an acceleration-time graph, using the graph shown in the picture, would the acceleration-time graph be a sine curve or cosine curve?

It depends where you take time= zero to be.
If you take time is zero at zero displacement, then at this point the acceleration is also zero. You would get a (negative) sine wave. (Value zero at t=0)
7. (Original post by Stonebridge)

It depends where you take time= zero to be.
If you take time is zero at zero displacement, then at this point the acceleration is also zero. You would get a (negative) sine wave. (Value zero at t=0)
In the mark scheme it says negative sine wave, but there is no indication in the question that we are suppose to take zero displacement to be t=0. Would we have to indicate in the graph that we have taken the initial displacement to be t=0?
8. It does no harm to state this.
However, it's generally accepted, unless otherwise started, that the original displacement time graph for SHM is a sine wave.
If this is the case, then the acceleration time graph is a negative sine wave and the velocity time graph is a cosine wave.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 17, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### Don't be a half-term hermit

How to revise this week and still have a life