Answer
During one beat of the heart, the blood moves approximately 8 cm.
Work Step by Step
The area between the velocity versus time graph and the x-axis is equal to the displacement.
From t = 0.1 s to 0.3 s, the area under the velocity versus time graph is $\frac{1}{2}(0.8~m/s)(0.2~s)$ which is $0.08~m$
Therefore, during one beat of the heart, the blood moves approximately 8 cm.
