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Bodies thrown Vertically Upward

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-45

2025-10-23

653

 When a body is rising against the force of gravity, the loss in its velocity is the same as its gain in velocity when falling; i.e., 32.16 ft. per second, if we neglect the resistance of the air. The body is said to have a negative acceleration, i.e., its velocity is uniformly diminishing and its final velocity is zero. Hence if a body is thrown vertically upward with a velocity of 64.32 ft. per second, it rises for 2 sec., when its velocity becomes zero and it begins to fall. It then falls for 2 sec., and reaches the ground with its original velocity of 64.32 ft. per second. The time during which a body will rise when thrown vertically upward may be expressed by the formula           t=v/g  * .

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*Time equals the initial velocity divided by the acceleration due to gravity.