Recent content by rwx1606

Sorry. I meant in general for a rolling object and not this particular problem with the disk.

Yes, that does help. However, what does it mean to for the disk to slide? Is the angular velocity less than the velocity of the center of mass? or is it greater than the center of mass? I know that if it's slipping then the relationship v=rw does not hold. Another related question is, does a...

Homework Statement A solid uniform disk of mass 21.0 kg and radius 85.0 cm is at rest flat on a frictionless surface. A string is wrapped around the rim of the disk and a constant force of 35.0 N is applied to the string. The string does not slip on the rim. How much string has unwrapped from...

What exactly the connection between a power series and taylor series? I know all taylor series are power series with the coefficients = f^n(a)/n!, but what can we say about power series? My graduate student instructor said that all convergent power series are taylor series and I don't quite...

Homework Statement Is the work done BY a spring always negative when you compress or stretch it? Homework Equations W=-1/2kx^2 The Attempt at a Solution I know that the spring force always acts opposite of displacement when compressing or stretch. So when you compress or stretch...

why does this inertial force act downwards on the block?

Homework Statement An inclined plane, fixed to the inside of an elevator, makes a 25 angle with the floor. A mass m slides on the plane without friction. What is the acceleration relative to the block if the elevator is a)accelerating upwards .35g b)accelerating downwards .35g? c)constant...

square.

sliding down the side of the bigger block.

Homework Statement So I have a system with 3 blocks, one small block is on top of the bigger block and another small block is on the left side of the bigger block. You apply an external force to the block on the side such that the system accelerates together. Assuming there is a friction force...

im super stuck. don't know how to get to the 2^n > 2n+1 step that the posters are talking about. I know I have to use 2^k=k^2 and also that 2^k+1 = 2(2^k).

what does RHS stand for? "added to factor the RHS"

no one?

Homework Statement The Sun sets, fully disappearing over the horizon as you lie on the beach, your eyes 30 cm above the sand. You immediately jump up, your eyes now 170 cm above the sand, and you can again see the top of the Sun. If you count the number of seconds ( = t) until the Sun fully...

hmm I can't get the subscripts to work for some reason.