Never mind, I solved the problem. I read "18 cm square" to mean 18 cm2, but I guess it really meant a square with 18cm sides, so A = .0324 m2. Sorry about that!
Homework Statement
A parallel-plate air capacitor is made by using two plates 18 cm square, spaced 3.5 mm apart. It is connected to a 3-V battery.
What is the capacitance?
Homework Equations
C = εo(A/d)
The Attempt at a Solution
εo = 8.854e-12
A = .18 m
d = .0035 m...
Homework Statement
A 5-kg object initially slides with speed V0 in a hollow frictionless pipe. The end of the pipe contains two springs, one nested inside the other, as shown above. The object makes contact with the inner spring at point A, moves 0.1 meter to make contact with the outer spring...
Sorry if I left the acceleration out-- the problem itself is part of a lab in which we're supposed to be finding the acceleration in a pulley system, but this was the setup my teacher had us use to calculate μ.
Here's the specific question in the lab asking us to set up the system:
"You...
Homework Statement
(there's a diagram that shows a crate on a plane inclined 19.29° above the horizontal)
Find the coefficient of kinetic friction.
θ = 19.29°
mcrate = .205 kg
Homework Equations
Ff = FN*μk
Fg = mg
FN = cosθ*mg
The Attempt at a Solution
I drew out a free-body diagram for...