Question

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

Answer 1

t=50 seconds

WORK:

Solving for t:

245 - 4.9t = 0

-4.9t = -245

t = -245/-4.9

t = 50 seconds