Recent content by listera

Does anyone know anything about building roller coasters on Roller Coaster Tycoon? We have to build them in Physics and I'm stuck on finding the sum of PE and KE for the model.

Thanks everyone...I eventually figured it out and i must admit i felt kinda stupid for not knowing it...haha. Ok how did you know it was #36? that's weird!

Can someone help me make a connection between kg/s and kgxm^2/s^2?? It's a power problem... Water flows over a section of Niagra Falls at the rate of 1.2x10^6 kg/s and falls 50 m. How much power is generated by the falling water?

hey thanks...i finally figured it out. (looking back...I found myself in a 'duh' moment there...) lol

yeah I drew a body diagram...the forces I have in the y direction are the natural force and gravitational force.

I have built a Goldberg machine that makes a ham sandwich and puts it into a lunch bag with no electric, and no outside forces. I'm pretty proud of myself. (is it obvious?) Oh, and I did this on my own, with no help.

actually, i don't really know why it's subtracted... I tried looking it up, but in vain!

muchos gracias! You guys helped a lot; my thanks to ya!

Thanks a bunch! (I didn't know that mg was subtracted from Fn!)

Help me! (mu K) Will someone PLEASE explain to me how to find the coefficient of friction when given the following: a box weighing 325 N moving with constant velocity across a floor, and it is being pushed with a force of 425 N exerted downward at an angle of 35.2 degrees below horizontal...