- #1
rahrah094
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Homework Statement
Hi everyone. I must say that for one thing, my physics teacher is incapable of explaining. We started this topic a day ago and now he asked us to perform a lab to find the relationship between the variables. I don't know what that means but I will add my thoughts in B3.
So, the lab is a centripetal force lab in which a string connects a vial stopper to a weight on the other end by passing through a vial. We spun the vial around in a circular motion in order to swing the stopper around in a circular motion. My group attempted two different experiments. One in which we kept the independent variable the radius of the string length from the stopper to the vial and the dependent variable the velocity of the spinning stopper. In the second one, the IV was the mass hanging on the bottom with the radius constant and DI as the velocity. The velocity for both was found by timing 15 revolutions for 2 trials, dividing the average by 15, finding the circumference of the radius and dividing that by the time for one revolution. My data for both is as follows:
Mass of stopper for both is .0238 kg
Velocity v. Radius
Radius (m) Mass(kg Time(avg)for 1 revolution Velocity
0.150 .0586 .422 2.24
0.300 .0586 .579 3.25
0.450 .0586 .658 4.29
0.600 .0568 .857 4.40
Velocity v. Mass on Bottom
Radius Mass Time(avg)for 1 revolution Velocity
0.300 .0586 .577 2.24
0.300 .1221 .446 3.25
0.300 .2176 .333 4.29
I graphed both of them and both v vs radius and v vs hanging mass
What do i do now? How do i show a relationship? I know that Fc = Fg= Ft, mass of stopper*ac=g*hanging mass. Also, i linearized the graphs. I don't know what to do after that. Am i supposed to graph v. radius and v. hanging mass (g)?