About 80 g of blood is pumped from the heart during each heartbeat. The blood starts at rest and has a speed of about 0.60 m/s in the aorta. If the pumping takes 0.17 s, What is the magnitude of the average force on the blood?
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m = 80 grams => 80/1000 kg => 0.08 kg
u = 0 ms-1
v = 0.6 ms-1
t = 0.17 s
F = ?
We know that,
v = u + at
=> 0.6 = 0 + a*0.17
=> a = 0.6/0.17
=> a = 3.53 ms-2 (approx.)
m = 0.08 kg
F = m*a
=> F = 0.08 * 3.53 => F = 0.2824 N
=> F = 0.28 N (approx.)
=>Hence, the average force acting on the blood is 0.28 newtons.
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