Sorry i cant read it so good. can you take another picture.
Answer:
The sum of forces acting on a particle of constant mass is equal to the product of the mass of the particle and its acceleration; 3. The forces exerted by two particles on each other are equal in magnitude and opposite in direction.
Dynamics and Vibrations - Forces and Momentswww.brown.edu › Engineering › Courses › Notes › Forces
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Vi
The answer is D, blood pressure between heartbeats
