Recent content by dreit

Your time for spacecraft 2 should be the same, then you could use d=1/2(Vi+Vf)t to solve for the initial velocity.

Wouldn't this equation be more for like a perfect case scenario where the room would be sealed off and not ventilated

To calculate the force u have to take into account the amount of friction and also the weight of the mass u have

Oh that's right I didnt realize that you would be using -U, sorry for any misleading

You would not be able to change those limits, because that would be integrating on the complete opposite side of the graph

Im just learning this now, but the equation that I would think of using for this problem would be I=(1/3)ML^2. Then modify the equation to take into account the second cylinder, but anyone else feel free to correct me.

then u should consider Fnet=W-T after you determine your vectors

try setting up the blocks into vectors first, this may help you be able to realize what you can set equal to one another

Im not quite sure but i would think that you would need to take into account centripetal force and acceleration http://en.wikipedia.org/wiki/Uniform_circular_motion#Acceleration

L= r*mv right? Cause the page says with respect to a point, which in this problem is p

Another equation that may be useful is (Gm1m2/r^2). For the part b, i was also thinking that since the orbiting path is a circle that the angular momentum would be consistant throughout so could u just use like the centripetal force formula with a few modifications?

Homework Statement Given: Two stars A and B, are in circular orbits of radii ra and rb, respectively, about their common center of mass at point P. Each star has the same period of revolution T. Determine expressions for A)the moment of inertia of the two-star system about its center of...

I used the equation (deltax)= v(initial)t + (.5)(9.8)t^2 Step One) 152=10t+4.9t^2 Step One rearranged for quadratic formula) 4.9t^2+10t-152=0 Got answers 4.62s and -6.683s, but time cannot be negative so i ruled out the second answer

Im not sure if I am correct or not, but when I did the problem i got t= 4.642s

I believe delta y would be 18.2, and your work seems right.