Question

A football is kicked and follows the path of a parabola for 8 seconds until it lands.

At which time would the football's height be neither increasing or decreasing?



At 2 seconds


At 4 seconds


At 6 seconds


At 8 seconds

Answer 1

At 4 seconds it is the maximum point in Parabola.

Hope this helps.

Answer 2

At 4 seconds because 4 is the maximum point in the parabola