Respuesta :
I assume that in this item, we are asked to solve for the force exerted during the heartbeat. Force is the product of the mass and acceleration. To solve for the acceleration in this item, we divide the velocity by time.
a = 1 m/s / 0.2 s = 5 m/s²
Then, we multiply this by the mass (in kg)
F = (80 g / 1000 g/kg) x (5 m/s²)
= 0.4 kg m/s² = 0.4 J
Therefore, every hearbeat will take 0.4 J of force.
a = 1 m/s / 0.2 s = 5 m/s²
Then, we multiply this by the mass (in kg)
F = (80 g / 1000 g/kg) x (5 m/s²)
= 0.4 kg m/s² = 0.4 J
Therefore, every hearbeat will take 0.4 J of force.
The work done on the blood by the heart is 0.04 Joules.
Further Explanation:
The heart is a central and most vital part of the circulatory system which works to pump blood throughout the body. The heart pumps oxygenated blood to the cells that need oxygen and increases the ability of the muscles to produce energy. The delivery of oxygen in the working muscles can be affected by factors such as stroke volume, cardiac output, heart rate etc.
The change in energy determines the amount of work done on a particular object. Here, work is done by the heart on the blood in order to accelerate it. The acceleration in blood is responsible for an increase in the blood’s kinetic energy.
The initial kinetic energy of an object = 0
The final kinetic energy can be determined by using the following formula;
[tex]{\text{KE}}=\dfrac{1}{2}{\text{m}}{{\text{v}}^2}[/tex]
Where, m is the mass and v is the velocity.
Mass of the blood (m) = 80 g or 0.080 kg
Velocity (v) = 1 m/s
Therefore,
[tex]\begin{aligned}\text{KE}&=\dfrac{1}{2}\text{mv}^{2}\\&=\dfrac{1}{2}\times0.080\times1\\&=0.04\text{ J}\end{aligned}[/tex]
Learn more:
1. Learn more about heart https://brainly.com/question/7301375
2. Learn more about blood https://brainly.com/question/8168020
3. Learn more about bloodstream https://brainly.com/question/310282
Answer details:
Grade: Senior School
Subject: Biology
Chapter: Body Fluids and Circulation
Keywords:
Heart, heartbeat, kinetic energy, acceleration, work done, blood, aorta.
