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
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