Physics EE on Terminal Velocity

[tnorkhangpa]

Hi Guys,
I am doing a physics ee on the terminal velocity. So I am going to drop a spherical object into a graduating cylinder which has a really wide diameter and is relatively tall. Now the problem is that I have to measure the time taken between a fixed vertical distance. I have to measure the time when the ball (which I drop) passes the lower limit.
Can you help me please?
you can email me at tse1417@yahoo.com
Please help
Thanks a lot,
Tsering

[ponjavic]

lasers! if your school has it or is willing to fund you :P
Ok it's probably not called that but it sounds cooler, something that emitts a ray which is broken your school should have it