Question

The work done by the heart for each beat is $1Joule$. Calculate the power of the heart if it beats $72$ times in a minute.

Answer 1

Step 1- Given data :

Work done $W=1J$

Time taken $t=1min=60s$

Step 2- Calculating total work done.

As work done by each beat is $1Joule$.

So in $72$ heart beats work done is -

$$\begin{gathered} W=1\times 72J \\ =72J \end{gathered}$$

Step 3- Calculating the power of the heart.

$$\begin{gathered} Power=\frac{Work}{Time} \\ =\frac{72}{60} \\ =\frac{72}{60} \\ =1.2W \end{gathered}$$

Thus, the power of the heart is $1.2W.$