A man squatting on the ground gets straight up and stands. The force of reaction of ground on the man during the process is.
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Verified by ExpertsThe correct answer is:
D
: In the process of getting straight up and stand from squatting position, the man exerts a variable force (F) on the ground to set his body in motion. This force is in addition to the force required to support his weight (mg). Once the man is in standing position, F becomes zero.
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