block slope friction lab

Analysis:

For each new block mass, calculate the magnitude of the kinetic frictional force from the measured t.  Also determine the normal force on the block.

mass	heaght	time	angle	normal	friction
0.09	0.5	1.23	0.4222743336	0.8045244111	0.2163237144
0.29	0.5	1.21	0.4222743336	2.592356436	0.6814537773
0.34	0.5	1.31	0.4222743336	3.039314442	0.8821520585
0.39	0.5	1.22	0.4222743336	3.486272448	0.9270491803
0.44	0.5	1.28	0.4222743336	3.933230454	1.111939677

Graph the magnitude of the kinetic frictional force against the magnitude of the normal force, for a constant angle of incline.  On the same graph, show your predicted relationship.

For each angle (h), calculate the magnitude of the kinetic frictional force from the measured t.  Also determine the normal force on the block.

mass	heaght	time	angle	normal	friction
0.1896	0.42	1.83	0.3514529377	1.744502096	0.5015248087
0.1896	0.46	1.38	0.3866082568	1.720941133	0.4576637855
0.1896	0.5	1.17	0.4222743336	1.694864759	0.4235550957
0.1896	0.54	1.07	0.4585216586	1.666154875	0.4183551342
0.1896	0.58	0.96	0.4954298206	1.63467273	0.3813703415
track length
1.22

Graph the magnitude of the kinetic frictional force against the magnitude of the normal force for a constant block mass.  On the same graph, show your predicted relationship.

Calculate the uncertainty in your experimental technique.   Do your two graphs agree?

The uncertainty of the coefficients of friction is: 0.96+-0.4 due to the sticker with bumps, the uncertenty is high

Conclusion: 

What is the coefficient of kinetic friction for wood on aluminum?  How does this compare to your prediction? 

the coefficient of kinetic friction is around 0.2-0.6, its abit off becasue the sicker on the track makes it really hard to get corrent data.