Question
Each time the heart beats, it requires 5 J of energy. If it beats 72 times in one minute then the power consumed by the heart is 360 W.
Answer: Option B
:
B
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B
We know that power is the energy consumed per unit time.
⇒ Power Consumed=Energy ConsumedTime
The heart beats 72 times in one minute i.e. 60 seconds.
Energy consumed in one heart beat = 5 J
Energy consumed in 72 heart beats = 5 × 72 J
On substituting all these values, we get
Power Consumed=5×7260=6 W
∴ The power consumed by the heart is 6 W.
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