h=80t -16t^2?

Question

when wil lthe ball land

Answer 1

0=80t-16t²
t=80/16 or 5 seconds or at 0 seconds

Answer 2

Plug 0 in for H. You cna factor a t out of 80t-16t^2, giving you 0=t(80-16t) By the zero product property, we know that either t=0 or 80-16t=0. We know that the first answer, t=0, is when the ball is thrown. Solving the second equation gives us t=5. So, the ball will land after 5 seconds, minutes, hours or whatever the unit of time is.

Answer 3

h=80t -16t^2

the ball is on the ground when h = 0, so:

0 = 80t -16t^2
= t(80 - 16t)
= t(80/16 - t)
= t(5 - t)

the ball will be on the ground at t = 0 (when it was thrown) and t = 5 (when it lands).

so there's your answer:

the ball will land at t = 5

Answer 4

this equation is in the form of newon's second law of motion which is of the form s=ut+1/2 at^2
where u=80
a=-32
the ball will be at the top when v=0
thus, the time taken for the ball to reach top will be determined by newton's first law of motion
v=u+at
0=80-32*t
t=80/32 = 2.5 so the time taken to reach the top is 2.5, the same time would be taken to fall back will be the same
so the time when the ball falls back would be 2.5 * 2= 5

Answer 5

Will land when h = 0
16t (5 - t) = 0
t = 0 , t = 5.
Ball will land after 5 seconds (presumably)

Answer 6

wen t=0 ot t=5
but at t=0 it can't land
so it'll land wen t=5