Work Energy And Power Question 203
Question: If the heart pushes 1 cc of blood in one second under pressure 20000 N/m2 the power of heart is [J&K CET 2005]
Options:
A) 0.02 W
B) 400 W
C) 5 × 10?10 W
D) 0.2 W
Show Answer
Answer:
Correct Answer: A
Solution:
$ Power=\frac{workdone}{time}=\frac{\text{pressure }\times \text{ change in volume}}{time} $ = $ \frac{20000\times 1\times {10^{-6}}}{1} $
$ =2\times {10^{-2}}=0.02\ W $
