A block A, placed on a horizontal surface with friction, is connected by a rope passing through a pulley to a suspended block B. The mass of block B is sufficient to set the system in motion and both masses accelerate with acceleration a. Test your model to obtain the kinetic friction coefficient uc and its uncertainty for this phase of the motion using the following values: We use g=(9.81±0.01) m/s^2 as usual.  mA=(0.415 ± 0.005)kg;  mB=(0.22 ± 0.004)kg;  a=(1.48±0.04) m/s^2; find an equation giving the modulus of kinetic friction (fc) under the horizontal slider when it is accelerated by the fall of the suspended mass and the value of uncertainty as well.

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Each measurement we take has a level of uncertainty in it. The smaller the uncertainty, the larger the precision our measurement has. Let's revisit how one might go about estimating the uncertainty in a measurement. If we assume our instrument is properly calibrated and we are not introducing systematic error through improper techniques, then if we take enough measurements, the average of these measurements will be around the true value. The upper and lower bounds of these measurements would then give us one method for determining our measuring device's uncertainty. (This of course is only true for a large set of measurements, but the approximation is good enough for now to get us started). For example, say we perform last week's experiment of pulling a block at a constant velocity with a force sensor across another rough surface. We take the following five measurements: F, = {2.51 N, 2.53 N, 2.50 N, 2.54 N, 2.49 N} The average of this dataset is F, = 2.51 N Now we have the choice of…

how do we find the mass in this case? if we know that mass of single nuts is 0.0069kg W=m.gravety