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M3

On q4e? what equation would i use
http://mathsathawthorn.pbworks.com/f/M3Jun06.pdf
Reply 1
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Graph
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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.
Reply 2
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Lychee628
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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.

The ms answer is 72?
Reply 3
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Original post by Ayaz789
The ms answer is 72?


What's the amplitude?
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Lychee628
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Original post by Graph
What's the amplitude?


6? So its 12*6?
Reply 5
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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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