In an experiment to find the coefficient of static friction μs between wood and a tabletop, the following data were recorded:
\nMass of block (including added weights) and corresponding horizontal force required to just start motion:
1.0 kg → 3.0 N
1.5 kg → 4.5 N
2.0 kg → 6.1 N
\nTake g=9.8ms−2.
(a) For each mass, calculate μs.
(b) State the average value of μs from the three trials.
(c) Using the maximum deviation of the individual values from the average as the absolute uncertainty, find the percentage uncertainty in the experiment.