The original problem is to find the velocity right before impact. Originally there was a moment of inertia for the pulley, on which the rope could not slip, so angular velocity had to be considered.
The student wanted to simplify by subtracting the two masses, (he came up with the 0, 1, 100...
Thank you! That's what I kept saying! Yes that's a typo on the bottom, I was considering substituting one expression into the other so was changing around the square roots and stopped halfway.
Homework Statement
I got into a disagreement with a fellow student today. He insisted that it's possible to simplify the system on the right as the system on the left. I agree with him that the difference in potential energy (and, therefore, the kinetic energy) is the same but I insist that...
Homework Statement
We are given a simple circuit with 4 resistors, a known voltage source, and an unknown voltage source. The photo is below in my solution attempt.Homework Equations
V=IR, R(parallel)=(1/R1+1/R2)^-1The Attempt at a Solution
I found the voltage drop over the given resistor, then...
J, they are in parallel. There are 2 possible paths for current so there is less total resistance for electrons being pushed through this path. You can think of this sort of like having 2 checkout lanes open at a grocery store. More shoppers can move through faster than if there were one lane...