Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 m/s to 40 m/s the first second and from 40 m/s to 45 m/s the next second. What is the car's acceleration?
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Ответ:
The runner's muscles have accumulated lactic acid.
Explanation:
During the long running of several miles, the body requires more energy. To accommodate energy requirement, cells also begin to respire anaerobically in the muscle cells, producing lactic acid and a small amount of energy. The lactic acid gets accumulated in the muscle cells. Due to the accumulation of lactic acid in the muscles and muscles feel fatigued and pain in the muscles.