mimbo193

I would appreciate some help with this error im experiencing. For some reason, I am unable to use any program, Abrosia especially. When I go to sign in on the opening screen, I enter my user and password. I know that im entering them correctly too so thats why this is really bugging me. I even tried reinstalling it and it didnt help .

Ok so my teacher hasnt taught us about free falls yet, but he expects us to do the homework. I guess its not much different then regular kinematics equations, but I am still severely confused.

there's a few problems i would really appreciate help with, that i have attempted. But I'll only put one for now.

(neglect air resistance)

You throw a stone vertically upwards with an initial speed of 6.0m/s from a third-story office window. If the window is 12m above the ground, find (a) the time the stone is in flight and (b) the speed of the stone just before it hits the ground.

So far i have gotten a value for A using the formula, y=Vi(t) + 1/2gt^2

i got 12=6.00t+4.9t^2. which i used to get a quadratic. from the quadratic formula (a=4.9, b=6, c=-12) i got that t=2.30s (because time cant be negative). but i don't know if this is correct, and i also don't know how to solve the second part of the equation.

Please help:)