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rm_girl
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Homework Statement
For our lab we had to find the coefficient of kinetic friction for a cart on a linear track. We pushed the cart on the track and it went through two photogates which measured the time it spent in the photogate.
So through the 1st photogate = 0.0040s
2nd photogate = 0.0062s
There was a flag on the cart which was 0.42cm.
So we found the instantaneous velocity through the first gate as v=0.0042m/0.0040s = 1.05m/s
The instantaneous velocity through the second gate was v=.0042m/.0062s = 0.677m/s
The mass of the cart is = 0.507 kg
Homework Equations
vf = vo + at
F=ma
Ff = ukFN
FN = mg
The Attempt at a Solution
I was going to use vf = vo + at
find the acceleration as
a= vf - vo/t
but I don't know what the time is between the change instantaneous velocity.
I know if I get the acceleration I can plug into the F=ma, find the force and somehow get the frictional force from there.
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