# Power output of a heart

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1. Nov 2, 2014

### Annika

1. The problem statement, all variables and given/known data

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.
2. Relevant equations
KE=1/2mv2
3. The attempt at a solution
I worked out that the kentic energy is 0.196 but idk of that is correct

2. Nov 2, 2014

### Orodruin

Staff Emeritus
The kinetic energy of what? How do you relate it to the power of the heart?

3. Nov 2, 2014

### Annika

I'm not sure I think it's the KE of the blood

4. Nov 2, 2014

### BvU

Show how you calculate that, please

Oh, and: welcome to PF :)

5. Nov 2, 2014

### Orodruin

Staff Emeritus
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?