What is the Average Power Output of a Human Heart Pump?

AI Thread Summary
The discussion focuses on calculating the average power output of the human heart based on the amount of blood pumped and its acceleration during a heartbeat. It notes that 20g of blood is accelerated from 0.20 m/s to 0.34 m/s at a rate of 70 beats per minute. A participant calculates the kinetic energy as 0.196 but expresses uncertainty about its correctness and relevance to the heart's power output. There is a request for clarification on how to relate kinetic energy to the heart's power and the need for proper unit specification. The conversation emphasizes the importance of clear calculations and understanding the relationship between energy and power in this context.
Annika
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Homework Statement



during a human heart beat, 20g of blood are pushed into the main arteries. This blood is accelerated from a speed of 0.20ms-1 to 0.34ms-1. For a heart pulsing at 70 beats per minute, calculate the average power of the heart pump.

Homework Equations


KE=1/2mv2

The Attempt at a Solution


I worked out that the kentic energy is 0.196 but idk of that is correct [/B]
 
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The kinetic energy of what? How do you relate it to the power of the heart?
 
Orodruin said:
The kinetic energy of what? How do you relate it to the power of the heart?
I'm not sure I think it's the KE of the blood
 
Show how you calculate that, please

Oh, and: welcome to PF :)
 
If you are not sure of what you have computed, how are we going to be able to tell you whether it is correct or has anything to do with what you are seeking? Also, you have also given a number. Energy is a dimensional quantity and you need to specify a unit. The question that remains is: What are you computing, how are you doing it, and why do you think it is related to the solution?
 
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