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a projectile is fired from the ground with an upward speed of 245 m/s. after how many seconds will it return to the ground? use the formula h=t-4.9t^2

Respuesta :

de0984238

t=50 seconds


WORK:


Solving for t:

245 - 4.9t = 0

-4.9t = -245

t = -245/-4.9

t = 50 seconds

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