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?

- anonymous

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- lgbasallote

this is pure math right? no physics involved?

- anonymous

2u/g

- anonymous

2.6

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## More answers

- anonymous

you dont show the angle (to the ground) of that velocity, i cant work out the answer!

- anonymous

smart :P
but that's not given :P

- anonymous

if thats the vertical velocity then angle is not needed

- anonymous

vertical is the angle!

- anonymous

and i think we can assume dat its the vertical velocity, or the question cant be solved

- anonymous

yah it shud say dat its projected vertically

- anonymous

so, bad question. :)

- anonymous

Solving Real-World Problems Involving Quadratic Equations

- anonymous

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

- anonymous

Better?

- anonymous

ya its 2.6

- anonymous

well my method to solve the prob is a physical way, which needs the angle.
can you tell me how to work out 2.6??

- anonymous

Yeah, how'd you get 2.6

- anonymous

Well it's more of a common sense guess becuase soccer balls don't stay in the air for 16 seconds or 27.6 and 42 feet per second is not gonna stay in the air for just one second. Also it matches up with A.Avinash_Goutham's answer.

- anonymous

I've played soccer for 10 years

- anonymous

it can be 1.3 :P
a gal can kick a ball that way........real world prob :P

- anonymous

Well if it is a question about when it will land it's not gonna go into the goal

- anonymous

i think da answer wud be 27.6 cos 42 feet per second is pretty fast and so it will stay in air for quite long

- anonymous

um y is it 27.6?

- anonymous

wat's the value of in fps?

- anonymous

oh oops, my bad, m wrong

- anonymous

i divided insted of multiplying

- anonymous

You can get that by using the formula h(t)= -16t^2+vt+s. V is the velocity ( in this case starting speed) and s is the starting elevation. You'd get -16t^2+42t=0. Then turn that into -16t^2=-42t. Then divide by -16t. It would be t=2.6

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