Question

Heather hits a tennis ball upward with an initial speed of 32 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

@Loser66

Answer 2

h = 0 when the ball hit the ground, so
0 = rt - 16t^2
Since r = 32,
0= 32t - 16t^2
16t(2 - t) = 0
t = 0 or 2

At t=0, h=0 but the ball hasn't left the ground yet.
Thus, the answer is 2.

I hope this can help.. :))

Answer 3

thanx

Answer 4

welcome.. :)))

Answer 5

And thanks for the medal..