Recent content by kikidoll

Thank you.

That's why I am confused... let me paraphrase the problem (I don't remember it verbatim- these numbers won't work but you'll get the idea): Car 1 is 1.45kg and is going 4 m/s in the positive x direction. Car 2 is 0.65kg and is going -0.9 m/s. They collide, and after car 2 is going 2 m/s...

If two cars are going towards each other, collide, and then are separated (have separate masses and separate velocities)... that is an elastic collision, correct?

Oh my gosh I can't believe I did that *facepalms* Thanks for your help, I really appreciate it

A) w = v/r = (3.50)/(0.400) = 8.75 rad/s B) Ki + Ui = Kf + Uf Ki and Uf = 0 Ui = Kf mgh = 1/2 mv2 + 1/2Iw2 (15)(9.8)(4) = 1/2 (15)(3.5)2 + 1/2 (I) (8.75)2 588 = 91.9 + 38.3(I) 496.1 = 38.3(I) I = 12.9 kgm2

Thanks for the reply. I also though I was rather large, but with my calculations that's what I ended up getting... strange.

Could you let me know if my answers are correct? Homework Statement A light rope is wrapped several times around a large wheel with a radius of 0.400m. The wheel rotates in frictionless bearings about a stationary horizontal axis. The free end of the rope is tied to a suitcase with a mass of...

Did I read this wrong... I assumed wf= 220rpm = 23.04 rad/s. Is the 220rpm actually w0? And if so, am I just converting it wrong?

Homework Statement A 750 gram grinding wheel 25.0 cm in diameter is in the shape of a uniform solid disc. When it is in use it turns at a constant 220 rpm about an axis perpendicular to its face through its center. When the power is switched off the wheel stops in 45.0 s with constant angular...