m1 formulas Watch

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TheWolf
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#1
Report Thread starter 14 years ago
#1
which ones do you need to kno apart from:

the 5 SUVAT equations
cosine rule sine rule
i=mv -mu
ft=mv-mu
sin30 = 1/2..cos30=a..blablabla
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Syncman
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#2
Report 14 years ago
#2
u dont need sine and cosine rules for M1 just the basic SOHCAHTOH trig equations.
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TheWolf
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#3
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#3
OK coool. So what units do we need to know then. Impulse = Ns....any others>
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Syncman
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#4
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#4
i dont really know. im not very good with units. i usually end up checking by doin eqn again just using units. Moments = Nm i think. N, ms-1, ms-2, s thats about it
i think. Gl this afternoon if ur takin M1
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TheWolf
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#5
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#5
Sometimes when there is a mass added onto a uniform plank, but it does not say exactly where it is, so does it matter where you put it on the diagram when you resolve the forces?
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Syncman
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#6
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nope. somewhere in the question it will prob say work out AD (A = edge and D=man).
Best thing to do is draw the man close to A and call the distance AD = x. then when u take moments its easy to relate to your diagram.
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TheWolf
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#7
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But if you put the mass to the other side, wont the force become the other direction e.g.Anticlockwise-->Clockwise when you resolve? Or is it still ok.
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Syncman
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#8
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ye thats fine. Just as long as u know which distance your working out. Usually taking moments from 1 end is the best idea. Unless u dont know R for one of the pivots.
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Syncman
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#9
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#9
Ok aint u gonna be late now? My M1 exam is in 20 mins. So id asume urs is the same
U should go now lol
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