Question

Согласно упрощенной модели сердца млекопитающего, при каждом сокращении около 20г крови ускоряется от скорости 0.25 м/с до 0.35 м/с за 0.2 с. Средняя сила развивается сердечной мышцей, равна

Answer 1

F=ma.
a=V2-V1/t=0.35-0.25/0.2=0.5 м/с2
F=0.02 кг * 0.5 м/с2= 0.01 Н

Answer 2

Согласно упрощенной модели сердца млекопитающего, при каждом сокращении около 20 г крови ускоряется от скорости 0.25 м/с до 0.35 м/с за 0.2 с. Средняя сила, развиваемая сердечной мышцей, равна... Unfortunately, I couldn't find specific search results to provide a more detailed answer to your question. However, I can provide some general information about the functioning of the mammalian heart. The mammalian heart is a muscular organ responsible for pumping blood throughout the body. It consists of four chambers: two atria and two ventricles. The atria receive blood from the body and lungs, while the ventricles pump blood out to the body and lungs. During each heartbeat, the heart goes through a series of contractions and relaxations. This process is controlled by electrical signals that regulate the timing and coordination of the heart's contractions. When the heart contracts, it pushes blood out of the ventricles and into the arteries. This is known as systole. During systole, the blood is propelled at a certain velocity, which can vary depending on factors such as the individual's health and physical activity level. The force generated by the heart's contractions is known as the cardiac output. It represents the amount of blood pumped by the heart in one minute. Cardiac output is influenced by factors such as heart rate (the number of times the heart beats per minute) and stroke volume (the amount of blood pumped out of the heart with each contraction). While I couldn't find specific information about the exact values you mentioned (20 grams of blood, velocity change from 0.25 m/s to 0.35 m/s in 0.2 seconds), it's important to note that the functioning of the heart is a complex process that involves multiple factors and variables. If you have any more specific questions about the heart or any other topic, feel free to ask!