Recent content by ArticMage

OK thanks that did it. What i was doing was -G*Ma*Mb/R as the gravitation pot energy for star a then the same equation for star b, and since they are the same i just did 2* that. I am not really clear on why I wouldn't have to do that. Since both have potential energies due to the other don't they?

Homework Statement Deep in space, two neutron stars are separated (center-to-center) by a distance of 18 X 106 km apart. Neutron star A has a mass of 153 X 1028 kg and radius 52000 m while the neutron star B has a mass of 159 X 1028 kg and radius 72000 m. They are initially at rest with...

Homework Statement http://img143.imageshack.us/img143/589/showmepl.gif The above figure shows a large, uniform brick supported on two cylinders L and R so that it is exactly horizontal. The areas of the two cylinders are related such that AL = 2.1AR. The Young's moduli of the two cylinders...

argh why is it always something so simple. thanks for the help though.

Homework Statement A uniform stick d = 1 m long with a total mass of 249 g is suspended vertically from a frictionless pivot at its top end. A wad of putty of mass 29 g is moving horizontally with speed v. It strikes and sticks to the stick at a distance 0.75 m from the pivot. What is the...

Ok I see what I did wrong. I did it MI(whole)-MI(small) but the MI(small) was just the MI of the removed piece itself, not as part of the whole. This makes sense, thanks.

Homework Statement A uniform circular disk has radius 35 cm and mass 350 g and its center is at the origin. Then a circular hole of radius 8.75 cm is cut out of it. The center of the hole is a distance 13.125 cm from the center of the disk. Find the moment of inertia of the modified disk...

Oh yeah that did it. I guess I just miss read it a couple times there. Thanks.

Nope I am plugging it into the online homework and it says its wrong. The first 3 are correct though.

http://img62.imageshack.us/img62/8481/showmepla.gif There is a picture that should clear things up. As for the 2nd post I've got all that I'm not seeing how it helps me with d.

Homework Statement A particle p traveling with a speed of vpi = 3 m/s hits and scatters elastically from another particle N, initially at rest. Particle p is deflected through 90°, leaving with a speed of vpf = 2.5 m/s, and a mass mp = 2 kg. a) What angle (in degrees) does the recoiling N...

Homework Statement http://img41.imageshack.us/img41/589/showmepl.gif Uploaded with ImageShack.us Masses m1 and m2 rest on a table 1.2 meters above the floor and are attached to m3 via a very light string and a frictionless pulley as shown above. The coefficient of static friction between...