IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Reference Material => GCE AS & A2 Level => Revison Notes => Topic started by: rreizend on May 22, 2010, 09:44:32 pm
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i just need all the formulas there are for the exam (Mechanics 1), along with the unit symbol definitions.
e.g
I = mv- mu (I-Impulse m-Mass v-Velocity u-Initial velocity)
thanks in advance.
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(displacement)= i+j (position vector) + it+jt (velocity * time)
u have the four equations of motions v=u+at s=u+v/2 s=ut+1/2at^2 v^2=u^2+2as
moment= force * distance
to convert from scaler to vector = scaler * i+j (unit vector)/ sq rt (i^2+j^2)(magnitude of unit vector)
force= mass*accelaration only when object is in motion
to get the angle between position vector and i or j do the following put tan ø = j/i without signs then check which quadrant does it exist example if i is negative and j positive then it is at the left up at the axis then the ø u found is the angle wiz the x axis subtract the angle or add to 90 or 180 or any other value in order to get it as a bearing or wiz y axis (wiz j in the question)it depends
also friction= ü (meo coofficeint of friction) * R (normal contact force)
thats all :D
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how do we find velocity when given position vector and speed
Thanks
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which exam did it come?
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woo thanks hood!