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# Aqa gcse higher physics help watch

1. I'm trying to do question 7(a) but just cannot do it. If anyone could go through the question with the working out it would be really helpful. Thanks

http://store.aqa.org.uk/qual/gcse/qp...W-QP-JUN08.PDF
2. If it's hovering then there is no resultant force, so we can infer that weight = change in momentum / time.

So as weight is equal to 0.6 we can say that the change in momentum is = to 0.6 x 10 = 6.0kgms-1

Momentum is equal to mass x velocity so velocity = change in momentum / mass = 6 / 1.5 = 4.0ms-1
3. Wow superb. I think i understand. Thanks ever so much
4. No worries

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