Question

If $P$ is the pressure at which the heart is pumping the blood and the volume of blood pumped per second is $V$, then the power of the heart is given by

• A. $\frac{P}{V}$
• B. $\frac{P^2}{V}$
• C. $P V$
• D. $\frac{P}{V_2}$
• E. $P^2 V$

Hint:

In fluid mechanics, power can be calculated as the product of pressure and flow rate.

Answer 1

The Correct Option is C

Step 1: Power is defined as the rate of doing work or the rate at which energy is transferred. The general equation for power is:

Power = Work done / Time

Step 2: The work done by the heart to pump blood is given by:

W = P × V

where P is the pressure and V is the volume of blood pumped per second.

Step 3: Since power is the rate of work done, we get:

Power = P × V

Step 4: Therefore, the correct answer is (C).