Question

The left ventricle of the heart accelerates blood from rest to a velocity of 26 cm/s. (a) If the displacement of the blood during the acceleration is 2.0 cm, determine its acceleration (in cm/s2). 170 Correct: Your answer is correct. cm/s2 (b) How much time does blood take to reach its final velocity

Answer 1

Step-by-step explanation:

Initial speed of blood, u = 0

Final speed of the blood, v = 26 cm/s

(a) Displacement of the blood, d = 2 cm

Let a be its acceleration. It can be calculated using third equation of motion as :

`a=(v^2-u^2)/(2s)`

`a=((26)^2)/(2* 2)`

`a=169\ cm/s^2`

(b) Let t is the time taken by the blood to reach its final speed. It can be calculated as :

`t=(v-u)/(a)`

`t=(26\ cm/s)/(169\ cm/s^2)`

t = 0.15 s

Hence, this is the required solution.