Recent content by hellocello

The more I think about it, I think the problem is too ambiguous. Whether or not resistors are in parallel of series depends on whether they split the current or all experience the same current, right? If these were in parallel, then the current would have to enter by the middle resistor to...

Simon, I see your point, I would find it easier to calculate the resistance if given two points within the network, but the question I came upon in my studying asked for the total resistance in a circuit like this one (with no battery). I couldn't decide between calculations. Thanks Drakkith...

I am confused how I would add certain resistors, like the ones in the attached picture (sorry it's a bad picture). If I add the first two resistors as if they were in parallel (as they are), couldn't I then add that equivalent resistance to resistor 3 as if they were in series, since the...

Oh it should be cos(0)- I forgot about that when you corrected my displacement. Thanks so much for your help!

Oops, it should be 1/sin(30), right? But then I'm still left with a cos(60) that doesn't cancel

Thank you! However wouldn't that distance be 1/tan(30) ? Because then the value I get is around 20...

1. The problem: A 5-kg block is moved from the ground to a height of 1 m via two different routes, vertically and along an inclined plane with angle of 30° to the horizontal. How much work is done on the block against gravity in each case? Homework Equations W=Fcosθd where θ is between...

Okay, that makes sense, thank you!

Homework Statement A student is trying to push a desk of mass m = 110kg and horizontal width w = 0.7m along the floor. The coefficient of friction between the desk and the floor is ms = 0.56. The center of mass of the desk is at the geometric center of the rectangle shown. If the force that...