A particle moves along the x axis from xi to xf . Of the following values of the initial and final coordinates, which results in a negative displacement? A. xi = 4m, xf = 6m
B. xi = 4m, xf = 8m
C. xi = 4m, xf = 2m
D. xi = 4m, xf = 2m
E. xi = 4m, xf = 4m

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?