College Physics Problem 2.2

Solution:

Part a

Based from the figure, B travels from 12 to 7. The distance traveled is 5 meters.

Part b

The magnitude of the displacement is 5 meters.

Part c

The displacement is calculated keeping in mind the sign. The motion started from 12 and ended at 7. Therefore, the displacement is

$\displaystyle \Delta x=7\:\text{m}-12\:\text{m}=-5\:\text{meters}$