Recent content by MacFanBoy

Haha, wow surprised I didn't see that one, thanks guys!

Homework Statement sinx cos2x=1 x is greater than or equal to 0 and less than 2pi Homework Equations What I used: 1-2sin2x cos2x-sin2x but there might be one that I didn't and should have... The Attempt at a Solution Basically I have...

Ok, that makes sense. I was thinking friction. But I had no idea on how to explain it. Thanks.

Yea, sorry. lowlypion is correct. The marble was rolled down a curved ramp, which was on a table. we measured the horizontal velocity when it was at the edge of the ramp, before it rolled off of the table. In the trajectory equation, vx=d/t "d" is the distance that we measured when...

Oh alright: I attached some images of the work. Seemed easier than typing it out.

Oh sorry about that, we measured velocity. Energy using PE=KE Free fall trajectory d=.5*g*t^2 Is that what you were asking?

Well this isn't really a homework problem, just was curious behind the reasoning. In a lab we rolled a marble off the edge of a table, and measured the velocity using: Energy and Free fall trajectory. But when comparing the two there was something like a 60% error, between the two...

Oh. Alrighty. I guess it just clicked in my head. Thanks.

Ok, so when I do: height of table = 84.4cm .844m=[.5*(9.80m/s)]*t2 I get t=.415s Then; dx=Vx*t gets me Vx of 1.07m/s Thats the velocity in the X-direction? If so then my other calculations are off by 400%... This is what I got for my other calcs: mmarble=13.7g...

Free Fall Trajectory So I am basically lost in what that means. I think it is the component method for vectors? Am I right? Some background on the lab: We rolled a marble down a curved ramp so that it went off the table and hit the ground in front of the table. (we marked where it hit with...