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Can anyone answer this Physics mechanics question watch

1. Hey everyone, I did this question in a past paper and came to mark it but the mark scheme just says correct shape so I dont know if its right or not haha.

If anyone could do it it would be great.

Many Thanks!

2. the displacement curve looks like

s = ksinpt + w for 0<= t <= 8 sec

so the velocity would be the derivative...
3. There is a stationary point at t=4 so the velocity curve should cross the time axis there. Since it is also a maximum, the velocity should be positve before t=4 and negative after t=4.

The gradient also looks like it is 0 at t=0 and t=8 so velocity should be 0 there as well.

It looks like it has the steepest gradients at t=2 and t=6, so the highest velocity is at t=2 and the lowest at t=6

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Updated: May 16, 2015
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