Recent content by NinjaHelper

As always, draw a Free-Body Diagram of what is happening. This will allow you to apply: sum of forces = mass*acceleration. Note: This only works for constant mass. Keep in mind of this, Newton's Second Law is really:force = change of momentum with respect to time. Then you would apply this...

Usually, when you talk about torque it means that the vector for torque is on the object or within it, or that it's a single vector. Moments are more broad in the sense that they can be placed anywhere. Wherever you want, and especially couples. Also, moments are related in my field (Civil...

My piece of advice to actively learn would be to be involved with the local college or universities physics clubs. Attend them, and have a notebook and pen handy. At the University of Washington (where I go to college); there's many clubs involving physics, mathematics, engineering etc. Many...

I call B.S., however it depends how you fall =). Is this elevator in an ideal world where there's no curvature in space, and the world isn't spinning. Or is it an elevator where the world isn't ideal and there's a curvature in space and the world is spinning.

Just for habit, when dealing with complex numbers I prefer changing x's into z's. So you know you're dealing with complex stuff, such as integrals. The problem when using residue calculus is that your contour is from 1 to 2, and in this case you residue is on 2. Which makes it break down...

The best way to do these problems is create a chart. Then from the chart, use some basic ideas and then apply the three basic equations for kinematics. The way you setup the chart should look like this, where o (naught) means initial. Such as xo means initial position along the x-axis...