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Professional Application: Blood is accelerated from rest
Chapter 2, Problem 26(choose chapter or problem)
Problem 26PE
Professional Application: 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?
Questions & Answers
QUESTION:
Problem 26PE
Professional Application: 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?
ANSWER:
ANSWER:
Step 1:-
The initial velocity of blood was, and the final velocity it reached was,
.
The distance covered during this acceleration was, .
So, the acceleration can be found by the given equation of motion,
.
a)
The situation will look like,
The diagram shows a constant acceleration of which changed the velocity from 0 to 30 cm/s.
b)
In the problem the knowns are initial and final velocities and the distance covered.
c)