Recent content by Cherrybawls

Thank you so much, RadioactivMan, that was very helpful

Is this a basic property of limits, or is there some theorem associated with this? Can you point me to some sort of reference or guide that could help me to better understand this?

Yes, HallsofIvy, that is essentially what I was doing, but it seems odd to me that limits behave in this way. Is it also true then, that: lim ln f(x) x->∞ is the same as ln lim f(x) x->∞

Well, I won't pretend to be an expert in this but I believe you are right it should be "c" and I think it has to do with the idea that the speed of light is constant in all reference frames. I think Einstein came up with the idea as the basis for special relativity but someone else might like to...

The problem was: lim x^(-1/x) x->∞

If I define the limit of f(x) as x aproaches infinity as "a", is it valid to say that the limit of e^f(x) as x aproaches infinity is e^a?

Homework Statement The balance wheel of an old fashioned watch oscillates with an angular amplitude π rad and period of 0.500 s. Find the maximum angular speed of the wheel. Homework Equations There are a lot of equations in this chapter and I don't even know where to start :confused...

The applied force is horizontal on the center of mass and then there is a tangential frictional force going in the opposite direction on the bottom of the wheel where it is in contact with the ground. And of course there is the normal force. Does the frictional force create torque or does the...

Homework Statement A constant horizontal force Fapp of magnitude 10N is applied to a wheel of mass 10kg and radius .3m. The wheel rolls smoothly on the horizontal surface, and the acceleration of its center of mass has magnitude .6 m/s2 (a) In unit-vector notation, what is the frictional force...

m/dx? I am just gessing really...

I'm not quite sure, is it another variable or is it something like m/x?

so would I be right in writing: Ug= ∫0.25mgx dx? If I set the lowest point of the rope equal to 0 and x cooresponds to the height of the rope?

Homework Statement A uniform cord of length 25cm and mass 15g is initially stuck to a ceiling. Later, it hangs vertically from the cieling with only one end still stuck. What is the change in the gravitational potential energy of the cord with this change in orientation? (Hint: Consider a...

I am confused, what are you referring to with u?

I don't believe a tangential acceleration exists in uniform circular motion, the magnitude of the tangential velocity should be constant...