So, I actually got the direction of the magnetic flux through the curved part of the surface correctly (inward). However, this shouldn't matter for the magnitude of the flux as long as I treat the flux of the side a different direction from the flux on the top and bottom. I don't understand why...
I have this problems I am trying to figure out:
So I know that $$\int B\, dA = 0 = \phi_{total}$$
$$\phi_{total} = \phi_{bottom} + \phi_{top} + \phi_{side} = 0$$
$\phi_{side}$ must be equal to the other two fluxes, since they are both outwards:
$$\phi_{side} = \phi_{bottom} + \phi_{top}$$...
Homework Statement
Find moment of inertia of a washer with a hole of radius r/2.
Homework Equations
Moment of inertia = integral of x^2 dm
γ = m / L
The Attempt at a Solution
I think I can find the moment of inertia of the washer using integral of x^2 dm. So, I know my γ = m / L = m /...
Ok so given that the length is 1 meter, I know λ = 0.2 / 1 = 0.2. I also know the moment of inertia is the integral of x^2 dm from -0.01 to 0.09, equivalent to λ * [ (0.09^3 / 3) - (-0.01^3 / 3)] = 0.000049. This answer is still not correct.
EDIT:
My bounds were incorrect. I got 0.48, thanks!
Homework Statement
The moment of inertia about an axis through the center of mass of a system consisting of two masses 3.0 and 5.0 kg connected by a rod of negligible mass 0.8m long is
Homework Equations
[/B]
I = I1 + I2
The Attempt at a Solution
I added all the moments of inertia of the...
Homework Statement
A meter stick has a mass of 0.2kg. A small hole is bored in it at the 10cm mark so the meter stick can be hung from a horizontal nail. The moment of inertia of the meter stick around an axis at the 10cm mark is
Homework Equations
m = 0.2kg
I = mr^2
The Attempt at a...
Homework Statement
Motor runs at a rate of four revolutions/sec has a torque of 20. What is it's power.
Homework Equations
T = (2π) / w
f = w / (2π)
w = 2πf
P = T * w
Power = Torque * angular velocity
The Attempt at a Solution
[/B]
T = 20 Nm
f = 4 * 2π = 8π
w = 2π * (8π) = 16π^2
P = 20 *...