Recent content by Hybrid_Theory

Origin of y is the centerline. I dunno, I'm really confused. :/

Either bottom or top plate, doesn't make a diff in this question. It's like a radius if you will. It says the flow is symetrical.

Homework Statement The velocity distribution for the floe of a Newtonian fluid between 2 wide parallel plates is given by the equation u=3V/2[1-(y/h)^2] where V is the mean velocity. The fluid has a viscosity of 1.915Ns/m^2. When V=0.61m/s and h=5mm, determine: A) the shearing stress acting on...

That's what I figured. So what do I do with it?

Homework Statement I need to intergrate sin(x^3) for a sum and I don't know how to. Homework Equations The sum is (integrate)3x+Sin(x^3)+1 The Attempt at a Solution I've tried substituting u for x^3 but I don't know where to go from there considering du=3x^2.dx, which isn't...

Thank you.

Homework Statement As part of a test I was given an irregular shape to find its centroid. It was a rectangle with a right angled triangle on its right side (I don't have a picture to upload for ye unfortunately). Homework Equations dA=y.dx X(bar)=intrecal x.y.dx Y(bar)=intrecal y^2/2.dy The...

The answer is 2-sqrt2 < t < 2+sqrt2 but I'm still at a lose on how to get this. =/

Homework Statement A particle has displacement x(t) = (t^3 - t^2)e^-t for times 0=<t=<9. Find its velocity v(t) and determine for what times the particle is moving in the positive x direction. Homework Equations Differentiating x(t) you get v(t)=-t(t^2-4t+2)e^-t The Attempt at a...