Recent content by robertsun

Alright, solved it! Thanks again

So what I am confused about now is that if my cart moves all the way so that the spring is fully stretched..is all pot energy in the spring? Or should i calculate the weight in there somehow.

sorry for that. Should have attached a picture. As you can see I am a newbie. But your diagram is correct...except its flat. I can use the same method correct?

wow thanks! That helped a lot. The only thing is (sorry i didn't make it clear) but my "ramp' is horizontal. So it just moves back and forth.

One of the problems I've encountered is how to plot the total length? Oh, and say I want to calculate my total pot energy at the start , there is not friction, and the total energy is equal to my gravitational PE from my weight...but i don't know the height. And i can't use the next max...

our teacher just basically told us to find μk...μs being negligible and everything else is negligible. The pos decrease is quite a lot actually. Basically max at beginning is like about 1 m, and then next one is 0.9 m then the next 0.8.. Not exactly..but close

Homework Statement I have an almost-frictionless air-hockey style ramp and i place it horizontally on a table. A little cart goes on top and on one end of the cart, i attach a string which connects to a pulley and then connected to a weight, thus pulling the cart to one side with the force of...