Question

A punter kicks a football upward with an initial speed of 48 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt − 16t2 where h represents height in feet and r represents the initial speed.

Answer 1

\[Vi=48m/s\]\[g=9.81m/s \]g=downward soo you h=\[48m/s \div9.81m/s=4.892...\]

Answer 2

now you need to rearrange ten formula for t is that formula saying\[h=rt-16t^2\]?

Answer 3

@LRGAUS95 ?

Answer 4

yes it is

Answer 5

@timo86m do u kno this

Answer 6

h = rt − 16t2

0= rt − 16t2

Answer 7

3 seconds ooh r is 48

Answer 8

so the answer is 3 seconds

Answer 9

@ConradBarczyk you dont have to do 9.8 m/s^2 the formula is done for you :)

Answer 10

Yes 3 seconds

Answer 11

LOL XD good point lol i did find the rest of the hard way :P \[t=\sqrt{h \div -16 +r}\]