Lactic acid is the cause of muscle fatigue.
A.
True
B.
False

The answer is True.

Lactic acid is a byproduct of anaerobic metabolism, in which the body produces energy without using oxygen. Intracellular acidosis due mainly to lactic acid accumulation has been regarded as the most important cause of skeletal muscle fatigue.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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