Question

The work done by the heart is $1J$ per beat. If it beats $72$ times in $1$ minute, then the power of heart is .

• A. $1.2W$
• B. $2.4W$
• C. $3.6W$

Answer 1

The correct option is A $1.2W$

It is given that, work done by the heart is $1J$ per beat.
The heart beats $72$ times in a minute.
Therefore, the work done by the heart in $72$ beats = $72\times 1$ = $72J$
Power = $\frac{WorkDone}{Timetaken}$
Power of heart = $\frac{72}{60}=1.2W$