Recent content by milan666

ok ill just use totally different numbers, (the answers are random, they wouldn't actually be that way) and I am not asking for the answer, just an explanation. Suppose the equation of the plane is 3x + 3y + 3z = 7 and the 2 vectors are (1,2,3) and (4,5,6). I need to find the coresponding value...

Thanks for the reply. I would give you the numbers but as i said, it would be plagarism since i am at uni. I used the dot product to find alpha, since cos90=0, the dot product should be zero? And the value of alpha for the plane is twice the value i got for the 2 lines, and is a different sign...

Homework Statement I'm given a vector (x,y,\alpha) (cant state exact number cause of plagarism). I have to find the value of \alpha which make the vector perpendicular to a plane. I also have 2 other vectors that are parallel to the plane. Homework Equations dot product. The...

Understood, thank youuuuuu.

Homework Statement Im given two vectors and I am told to find theyre unit normal vector. Homework Equations a x b The Attempt at a Solution I used the cross product of the 2 vectors to find the normal vector, however, it came out to be i + j + k. My question is, is this already a unit vector...

Hi, In a cantilever beam with a load on the free end, at a point on the neutral axis, will the normal stresses (due to bending stress and axial stress) be zero? Or am i wrong? And if i was to draw a Mohr circle for that point at the neutral axis, would the center of the circle be the origin? I...

Oh ok i got it now, y is the distance from the neutral axis to the centroid of the area where you make the cut. Thanks!

Thats what we were taught to use. S is the shear force at that point on the beam, A is the area of the cross section, y is the distance form the neutral axis, b is the width of the cross section, I is the second moment of area.

Its a cantilever beam, with a rectangular cross-section, and i have to find the shear and normal stresses on a point which is at the neutral axis. If y is zero, then the shear force would be zero. Does that mean that there are no shear stresses at a point on the neutral axis? I can't post the...

Hi, if the shear stress on an element in a solid is SAy/bI, where S is the shear force and y is the distance from the neutral axis, what value of y do i use if the point I'm calculating is on the neutral axis?

heres the pic, sorry:P

Homework Statement The picture shows a body of mass 0.24kg attached to a fixed point P by a light string of length 0.80m. When the body is at A, vertically below P, it is given an horizontal velocity of 5m/s as shown. It the flollows a circular path to the position B. When it is at B...