Suppose that you have a 9.0-V battery and wish to apply a voltage of only 3.5 V. Given an unlimited supply of 1.0-Ω resistors, how could you connect them to make a “voltage divider” that produces a 3.5-V output for a 9.0-V input
r=resistance of 1 resistor=1
Two circular disks, each of area 4.10×10-4 m2, are situated parallel to one another. The distance between them is small compared with their radii. Both disks are uniformly charged; their charges per unit area are σ = 5.00×10-5 C/m2 for one and -σ = -5.00×10-5 C/m2 for the...
Two identical simple pendulums, of length 0.25 m and period T, are mounted side-by-side. One is released from rest with an initial angular displacement of π/9 rad, and the other is started with an initial angular velocity of 0.1 rad/s at θ = 0. They are both started in...
Thanks so much guys, I got it! It seemed so obvious this morning, I guess that's why you shouldn't do physics at 2am. I was comparing it to a question I had done with a mass on a rotating disc, forgetting that the disc was still rotating about the central axis
Sorry I made a typo in the question, 0.43 should have been 0.55. I've fixed it now. (1.2 is 0.65+0.55, the "position" of the clay on the rod with respect to the end).
That's what I was thinking with the moment of inertia...but doesn't adding the mr^2 take that into account?
I could also do...
On a frictionless table, a glob of clay of mass 0.380 kg strikes a bar of mass 0.9 kg perpendicularly at a point 0.550 m from the center of the bar and sticks to it.
a) a) If the bar is 1.300 m long and the clay is moving at 8.100 m/s before striking the bar, what is the...
That was it! It makes sense too. The "deceleration" from E to F should be less than D to E, but it could still be slowing relative to the speed before D, or it could be speeding up depending on the angle.
"Easy" conceptual energy problem?
Here's the diagram
A bead slides on a wire, which is in a vertical plane, as shown in the diagram. Gravity acts in the -y direction. The bead starts at A, moving to the right with an...