Recent content by Minestra

I'm curious if anyone knows of a good video of an extreme amount of pressure being applied to a sold amount of metal or other dense object. We're learning about fluids in my class, and naturally we discussed submarines, empty bottles, etc. but everything mentioned seemed to be hollow on the...

Sorry for the long delay I have been busy with work. Here is my attempt at this problem: Angular Momentum: $$\frac{1}{2}m_{1}r^{2}\omega_{1} = \frac{1}{2}(m_{1}+m_{2})r^{2}\omega _{2}$$ solving for ω2 and canceling out what you can, you get: $$\omega_{2} = \frac{m_{1}}{m_{1}+m_{2}}\omega...

Sorry for the photo reply I'm on my moble. I'll do my best to type it out once I'm back on my desktop. If I rework using I = mr2 and ω = v/r, would the rest of my thought process be correct in using the angular velocity at moment two, to find a new kinetic energy, which could then be subtracted...

So I think I solved the problem do you mind looking over my work?

Thanks for talking it out with me, got to work an overnight now, I'll do the algebra tomorrow.

Then I would basically set the difference over the original and that would be the answer?

So I would solve for the new velocity and use that to find the kinetic energy after the collision?

Well I do believe it's conservation of momentum, but I'm having trouble figuring out what they're asking me to solve for once I write out the equation.

Homework Statement A disk of mass m1 is rotating freely with constant angular speed ω. Another disk of mass m2 that has the same radius is gently placed on the first disk. If the surfaces in contact are rough so that there is no slipping between the disks, what is the fractional decrease in the...

Well there's 20 points I lost by writing Vox and Voy oppose to VoCOS(Theta) etc. Thanks for the response lesson learned.

So I just got beat up by this question on my midterm. I'm not sure if these problems are always called definition of success but that is how my professor refers to them as. The question: (paraphrased) When you walk into your dorm room you like to throw your keys onto the center of your desk...

##\sqrt{\frac{g}{2}}## Sorry I'm still figuring out formatting on here.

Homework Statement In Example 2.6, we considered a simple model for a rocket launched from the surface of the Earth. A better expression for a rocket's position measured from the center of the Earth is given by Y(t)=(RE3/2+3(√g/2)REt)2/3 where RE is the radius of the Earth (6.38 ✕ 106 m) and g...

Hazah, thank you. Its a rather embarrassing mistake when I see it now.

Homework Statement The instantaneous speed of a particle moving along one straight line is v(t) = ate-3t, where the speed v is measured in meters per second, the time t is measured in seconds, and the magnitude of the constant a is measured in meters per second squared. What is its maximum...