Recent content by TrippingBilly

No it can't, so the fact that there is a row of zeros doesn't matter for the columns of the matrix..

Homework Statement Are the columns of this matrix linearly independent? 1...3...-2 0...-8...11 0...0...1 0... 0... 0 (periods are just to make spacing clear) The Attempt at a Solution What is confusing me is the last row of zeros. If a set of vectors contains the zero vector, it is linearly...

If this is true, then will the determinant of any matrix containing a row vector consisting of all zeros will be zero?

Problem statement: Find the determinant of the following matrix by row reduction to echelon form. |1 3 3 -4 | |0 1 2 -5 | |2 5 4 -3 | |-3 -7 -5 2 | I reduced this matrix to |1 3 3 -4 | |0 1 2 -5 | |0 -1 -2 5 | |0 2 4...

http://filesaur.us/files/1912/pulley/ T1 = T2 = T3 = T4 = mg T5=Mg I don't know how to bring L or h into this.

http://filesaur.us/files/1858/pulley/ Derivation of equation for mass on pulley and displacement Sorry that the picture stinks, but its all I got. The system is in equilibrium.The counter mass on the left is mass A and the mass on the right is mass B, both of mass m. The center mass of...

Oh no, I stopped looking at the problem for a while. But I decided to come back to it, and I had posted another question, but in the meantime I figured out the answer so I edited my post to the one you quoted. No worries :)

A block of mass m1 = 2.05 kg and a block of mass m2 = 5.95 kg are connected by a massless string over a pulley in the shape of a solid disk having radius R = 0.250 m and mass M = 10.0 kg. These blocks are allowed to move on a fixed block-wedge of angle = 30.0°. The coefficient of kinetic...

never mind, i got it :)

At first I didn't see where you were going, but then I realized that work = change in energy. Which enabled me to use that wonderful equation delta K = .5I(final angular velocity^2 - initial angular velocity^2). Thanks for the hint!

A top has a moment of inertia of 4.40 10-4 kgm2 and is initially at rest. It is free to rotate about the stationary axis AA'. A string, wrapped around a peg along the axis of the top, is pulled in such a manner as to maintain a constant tension of 5.19 N. If the string does not slip while it is...

Huh, I guess I never considered that. That's frustrating :\ Thanks for your help though :)

A rotating wheel requires 2.98 s to rotate through 37.0 revolutions. Its angular speed at the end of the 2.98 s interval is 98.8 rad/s. What is the constant angular acceleration of the wheel? First I tried acceleration = (98.8rad/s - 0 rad/s) / 2.98 s - 0s = 33.15, which was incorrect...

Momentum, so... 2.49e4 * 3.89 + 3*2.49e4 *1.95 = 4*4.29e4 * V ?

A railroad car of mass 2.49 104 kg, is moving with a speed of 3.89 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of 1.95 m/s. (a) What is the speed of the four cars after the...