Question: To find the acceleration of a cart, a student measures its initial and final velocities, u; and no and computes the difference (tif - u1). Her data in two separate
trials are shown in Table. All have an uncertainty of ± 1%. (a) Calculate the absolute uncertainties in all four measurements; find the change (ut- - u1) and its uncertainty in each run. (b) Compute the percent uncertainty for each of the two values of (uf - va. Your answers, especially for the second run, illustrate the disastrous results of finding a small number by taking the difference of two much larger numbers.