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# Help with some mechanics work Watch

1. Hi guys, I asked a question before and got some really good help on this forum so was wondering if I could get some help on 2 more parts worth 5 marks in total.

http://oi46.tinypic.com/33udb8o.jpg This is the question.

I've managed to do parts a) and b) getting:

a) x(t) = 19.15t and y(t) = 16.07t - 4.91t^2

b) t = 3.276 s

For part c) someone tried to help me in class by giving me an equation of -0.01x^2 + 0.84x + 2 = 0 but I'm not sure where they have got this from? Once I find that out, I'm pretty sure its just a simple case of solving for x.

Finally I'm not sure how to even start part d). Any help on this question would be amazing! Even just pointers in the right direction!
2. resolve vertically and horizontally
3. Sorry, I'm not sure I follow
4. resolve and use the formulas#(uvas i think their called)

mechanics is so easy..

you get it?
5. Rightio resolve horizontally and vertically for everything. So get your suvats for bothe the horizontal and vertical.

For b the time will be the same for both - so use the component with the most information - I'll give you a hint its the vertical one
6. I managed to do b) doing that, but I was wondering about c)? can I just use S/T = (U+V)/2 to find the horizontal distance that it travels?

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Updated: April 14, 2013
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