## College Physics (4th Edition)

The correct answer is: (a) 720 m, south The area under the velocity versus time graph is the displacement. Each block in the graph is $1~m/s \times 120~s = 120~m$ From t = 18.0 min to 24.0 minutes, there are 6 blocks under the graph. Note that the blocks are below the x-axis so this is a negative displacement. The displacement is $-(6)(120~m) = -720~m$ A negative displacement means that the jogger moves 720 m to the south.