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# M3

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. On q4e? what equation would i use
http://mathsathawthorn.pbworks.com/f/M3Jun06.pdf
2. Since you know period is 4s and you've worked out the amplitude of the motion, you know how far it travels every 4 seconds. So I think you'd just multiply that by 3. No equations needed.
3. (Original post by Graph)
Since you know period is 4s and you've worked out the amplitude of the motion, you know how far it travels every 4 seconds. So I think you'd just multiply that by 3. No equations needed.
4. (Original post by Ayaz789)
What's the amplitude?
5. (Original post by Graph)
What's the amplitude?
6? So its 12*6?
6. (Original post by Ayaz789)
6? So its 12*6?
The best way to think of it is 3*(4*6)

So let's say you have 3 points - A, B, and O. O is the centre of oscillation. A and B are both 6m (the amplitude) away from O in opposite directions.

Say the particle starts at A. In one oscillation, which takes 4 seconds, it will travel from A to O, then from O to B, then from B to O, then from O to A. Each of these distances is 6m, so it travels 4*6 = 24m in 4 seconds.

So, in 12 seconds, it'll travel 24*3 = 72m.

Hope that makes sense.

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Updated: June 26, 2016
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