PLEASE show steps, i think I know how to do it but I am confused about how it co

Question

PLEASE show steps, i think I know how to do it but I am confused about how it could be so simple. The first one I got t=1.22 sec to the top so 2.44 total. displaced 7.34 m

For the following questinos use the formulas: a(t) = -9.81 v(t) = v0 - 9.81t x(t) =x0+ v0t -1/2 9. 81t2 a(t) = - rho v - 9.81 If an object is thrown up 1 from the ground, with an intial velocity of 12 meters/second. what is the time that it reaches its maximum height, if air resistance is ignored? For the same object, what if we consider air resistance if rho = 1/4 ? (Do not try to simplify your final answer)

Explanation / Answer

1) time= intial velocity/ accelration = 12/9.8=1.22 sec

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