Question
Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm by the left ventricle of the heart. (a) Make a sketch of the situation. (b) List the knowns in this problem. (c) How long does the acceleration take? To solve this part, first identify the unknown, and then discuss how you chose the appropriate equation to solve for it. After choosing the equation, show your steps in solving for the unknown, checking your units. (d) Is the answer reasonable when compared with the time for a heartbeat?
1. Please see the solution video
2. $x_0 = 0\textrm{ m}$, $v_0 = 0 \textrm{ m/s}$, $t_0 = 0 \textrm{ s}$, $x = 1.80 \textrm{ cm}$, $v = 30.0 \textrm{ cm/s}$
3. $t = 0.120 \textrm{ s}$
4. Yes, the answer is reasonable compared to the duration of a single heart pulse.
Solution Video