Recent content by PrestonBlake

So as an aside during class my ECE lab TA mentioned that you could make an up/down counter using nothing but JK flip flops, we've already done an up/down counter using JKs, AND gates, and OR gates, and I understand how you could make an up counter by taking the Q prime from one flip flop and...

From what I understand, they mean the local forces.

I'm not that good at integrals, what should I be integrating?

It says the total outward force, which I take it means just the force from inside. I integrate 101325+1000*9.8*d from 0 to 30 and get 7.44975*10^6, then I multiply by 2*Pi*15*30 and get 2.10637*10^10 which is wrong.

Homework Statement There's a 30 m high, 30 m diameter cylindrical metal tank used for storing water. The molasses has a density of 1000 kg/^3. If the pressure at the surface was equal to the air pressure outside the tank, find the force pushing outward on the sides of the tank. Homework...

As a second question, what would the arm length be if the force was acting at the top of the wheel instead of at the middle.

Thanks, it turns out I had switched the angle of gravity with the angle of the force.

That's what I did, but apparently I messed up the trig on my way to the answer.

Are you sure? It's a given that F is pushing on the center and I'm assuming that gravity is working on the center of mass, which should be the same as the center.

Homework Statement You have a wheel of mass m and radius R you're trying to push it onto a block of height h that it's next to. Find the minimum force F that will let you do this. F is completely horizontal and acts upon the center of the wheel. Homework Equations I'm trying to solve...

That was just a typo. Thanks for your help.

Yes, turns out I multiplied wrong. The correct answer is ML^2/6.

I tried ML^2 /24, but that's incorrect.

According to the problem statement, dm = yxdx. Edit:Substituting yxdx for dm I get ∫(L-x)^2*yxdx. Integrating from 0 to L I get L^3*yx/3. Multiplying by M/(2yL^2) I get ML^2 /24. How's that?

I'm still thinking it should be L-x, since the density gets lower as it gets farther from the end.