Recent content by apierron

Okay thanks! I think that will be way easier than what I was trying to do.

Okay so I took another look at this problem and I'm pretty sure I went about it all wrong. My new approach would be to take the ∫F ds, where F would be the sum of my forces and ds would be the change in arc length. I started working this out and I just don't know what to set my limits as and...

I forgot, he also gave us the length of one side of the cube as 3cm

A cube of polished steel sits on top of a highly polished and waxed hemisphere of polycarbonate (radius 92 cm). For these two surfaces interacting, the coefficient of kinetic friction is the same as the coefficient of static friction. The cube is given a very small 'nudge' perpendicular to the...

so 1 rpm is 2pi radians/60 s, so now I have v(N)=60Rp/N... better?

Okay so what I found is v= ωr so I came up with v(N)=2(pi)Rp/N but since he says N is rotations per minute I divided that by 60 to get v(N)=120(pi)Rp/N so that my units are in m/s Does this seem right?

This sounds bad but I don't know what w represents

A flat, circular plate (mass Mp, radius Rp, thickness Tp) rotates parallel to the surface of the Earth on a frictionless axle. As it spins, a point on the top of the disc traces a circle each time the plate completes a rotation. in terms of the number of rotations per minute (N/min), create...

Ok thanks! I think I have it figured out. I was wondering what did the velocity of the cart have to do with anything?

So kind of like going backwards?

Homework Statement As a participant in a robotic competition, you must launch a potato from a moving cart and strike a target. The potato must reach the apex of flight just as it travels over a screen, then it must pass through the center of an opening in a wall. The cart moves at a steady...