Question

The heart of a deer chased by a tiger beats 200 times in a minute and does a work of 1.4 joules per beat. What is the power of heart?

Answer 1

\[ \text{Number of heartbeats per second} = \frac{200}{60} \]

\[ \text{Work done per second} = \frac{200}{60} \times 1.4\ \mathrm{J} \]

Work done per second = 4.67 J/s

Since 1 J/s = 1 W, the power of the heart = 4.67 W.