Question

Arianna kicks a soccer ball off the ground and into the air with an initial velocity of 42 feet per second. Assume the starting height of the ball is 0 feet. Approximately, how long does it take until the soccer ball hits the ground again?

1.3 secs

2.6 secs

16.0 secs

27.6 secs

Answer 1

first since a due to g is 9.8 convert that to -32. ....

and use equation 0=-.5*a*t^2+vi and solve for t

0=-32.15223 *.5*t^2+42

Answer 2

So, what's the answer?

Answer 3

1.3 roughly

Answer 4

Thanks!

Answer 5

but hold on

Answer 6

it is 0=-32.15223 *.5*t^2+42t

so the answer is 2.6

Answer 7

Ok. Thanks.