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# FP2 Summer 2009 Q1 where am I going wrong here. Watch

1. (Original post by davros)
Integration is irrelevant to this question - I can't see the word "integral" mentioned anywhere in the screenshot.

Areas are always positive; integrals can be negative.

If you were asked to paint the area, would you go out and buy "minus 10 litres of paint"? I don't think so
If on the other hand, since we are insisting on giving a physical interpretation to a pure maths question. If this was a velocity time graph, the area underneath would be a displacement in the opposite direction of any areas that were positive.

As for painting walls, I have all my origins at floor level and buy paint made for the local coordinate system.
2. (Original post by davros)
Integration is irrelevant to this question - I can't see the word "integral" mentioned anywhere in the screenshot.

Areas are always positive; integrals can be negative.

If you were asked to paint the area, would you go out and buy "minus 10 litres of paint"? I don't think so
To warm to the theme, when I go out in the morning, I exploit the negative area in my velocity time graph to get home, presumably, you circumnavigate the world (or the universe) in order to get back home.
3. Area underneath velocity time graph is distance, not displacement. To get home, you would have to travel a positive distance.

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