Watch the video carefully to determine what is going on. http://serc.carleton.ed

Question

Watch the video carefully to determine what is going on.

http://serc.carleton.edu/dmvideos/players/88129.html?hide_banner=true

Your task is to determine the coefficient of static friction between Einstein and the Graviton. Use the video experiment to determine the data for this result EXCEPT!!! There are 12 stationary red lines around the rotating platform. For your experiment, just when Einstein slides down the wall, assume it took 19 frames of the video for one point on the rotating platform to go from one red line to the next. The frame rate of the camera is still 240 frames per second. What is the coefficient of static friction between Einstein and the wall?

Explanation / Answer

Centrifugal force,

F = m*v^2/r = Normal force, N

Frictional force,

Fr = mu*N = mu*m*v^2/r

mu = Fr / m*v^2/r

here, v = (19/240)*12*2*pi*30

v= 178.98

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