Question

The power of a heart is 1.25 W that beats 72 times in a minute. Calculate its work done​

Answer 1

72 beats =60 sec.

1 beat =60 /72 =5 /6 sec.

Now, work = power × time= 1200 × 5/6=1000Joule= 1 KJ.

Answer 2

Answer:

1 KJ per beat

Explaination:

72 beats in 60 seconds

so, 1 beat = 60/72

= 5/6 sec

Power = 1.25 W

Time = 5/6 sec

so, Work done = Power X Time

= 1200 X 5/6

= 1000 J

= 1 KJ

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