Recent content by jl9999

...actually (a) was right, according to the webassign(auto-grading homework website) Thanks for pointing out what I missed though. I often misread stuff. hopefully I can get it now.

Homework Statement A small ball with mass 1.70 kg is mounted on one end of a rod 0.750 m long and of negligible mass. The system rotates in a horizontal circle about the other end of the rod at 5030 rev/min. (a) Calculate the rotational inertia of the system about the axis of rotation...

Now that I look at it again with your explanation in my mind it seems very easy. Anyway, thanks for your help and the quick tutorial.

Yeah, I can't make complete sense of the notation. I'm guessing it's something about an integral and a dot product but I might need a little extra push. thanks

"Work Done by 2-D Force" What work is done by a force = ((1 N/m)x) + (4 N), with x in meters, that moves a particle from a position 1 = (2 m) + (3 m) to a position 2 = - (4 m) - (3 m)? I figured all I would have to do is find the displacement of the x and y coordinates after the force had...