Acceleration of blood pumped by heart

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SUMMARY

The discussion centers on calculating the acceleration of blood pumped by the heart's left ventricle, which accelerates blood from rest to a velocity of +23.9 cm/s over a displacement of +1.80 cm. The appropriate formula for this calculation is v² = v₀² + 2ax, where v is the final velocity, v₀ is the initial velocity, a is acceleration, and x is displacement. Participants emphasize the importance of showing work to identify errors in calculations, as textbooks may sometimes contain inaccuracies.

PREREQUISITES
  • Understanding of kinematic equations, specifically v² = v₀² + 2ax
  • Basic knowledge of physics concepts related to motion
  • Familiarity with units of measurement in physics (cm/s, cm)
  • Ability to perform algebraic manipulations to solve for unknowns
NEXT STEPS
  • Review kinematic equations in physics for motion analysis
  • Practice solving problems involving acceleration and displacement
  • Explore the relationship between velocity, acceleration, and time in motion
  • Investigate common errors in applying kinematic formulas
USEFUL FOR

Students studying physics, educators teaching motion concepts, and anyone interested in understanding the mechanics of blood flow in the cardiovascular system.

melinaamos
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Hey,
I"m having a few problems with some motion problems and was wondering if someone could help?

The left ventricle of the heart accelerated blood from rest to a velocity of +23.9 cm s-1. If the displacement of the blood during the acceleration is +1.80 cm, determine its acceleration (in cm s-2).
 
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Welcome to PF!

Hi melinaamos ! Welcome to PF! :smile:

vi = 0, vf = 23.9, x = 1.8.

(btw, you should have used the standard form for homework questions)

Hint: what equations do you know relating vi, vf, x and t? :smile:
 
Hey,

i'm using v2= vo2 + 2ax but still getting the answer wrong
 
melinaamos said:
Hey,

i'm using v2= vo2 + 2ax but still getting the answer wrong

Hi melinaamos! :smile:

Well, that's the right formula.

Show us your working, so we can check it.

(Sometimes the book is wrong! :rolleyes: )
 

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