Recent content by breen155

Hello All, I have been asked to design and build a rig that will introduce the concept of a mass spring damper system to mechanical engineers in their early years of university. To make it slightly more complex, the rig needs to be torsional rather than linear. My design so far is to use a...

Ok I understand now. Thanks for all the help guys

theta is 60 degrees but how do i tell the direction of rotation, clockwish or anticlockwise ? :) (thanks for the help so far btw)

costheta = .5 and sintheta = sqrt3/2 ? :)

not too sure what you mean sorry I only started teaching this to myself this morning :S erm... is it costheta - sin theta = .5 and sintheta + costheta = sqt3/2 ?

Homework Statement Hey guys, I'm not sure if this bit is relevant but the first part of the question is... 'The diagram shows a triangle with vertices O, A(1,2) , B (0,2). The question I need help with is 'Each of the following matricies represents a rotation about the origin, Find the angle...

:) oh i get it now, thanks for all the help :)

so its (9.81 x 60)-2.03 = 586.57N

so is it Force = weight (mg) - contact force?

well the forces acting downwards are her weight and the centripetal force? and upwards is the contact force between her and the scales?

Hey, I am having a problem understanding something to do with circular motion, its the last part of a question. Homework Statement part 1 - Calculate the angular speed of a girl standing at the equator, i used angular speed = 2pi/(60x60x24) = 7.3x10^-5 rad/s part 2 - The...

I finally got it, thanks for the help everyone :)

if i place that in my formula it doesn't give me the same answer as my textbook though if sinx = 0.5 then 0.5cosx=1/4 then it gets cosx = .5 this is pie/3 however the answers in my textbook say pie/12 pie/4 etc

:P in the end i get sinxcosx =0.25 but in not sure how to get the answer out of it :P

not too sure is it when they are being added or subtracted?