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 $



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