How to calculate average power?

[ben2010]

during a human heart beat, 20g of blood are pushed into the main arteries. This blood is accelerated from a speed of 0.2m/s to 0.34m/s. For a heart pushing at 70bpm, calculate the average power of the heart pump

 

[Naty1]

This appears as homework, and this is not the place, but power is the time rate of doing work.

P = work/time = Fd/t = F v = Ma v