M2 - 4.11 Projectile Motion 11/12/20

What is the starting height of a ball that follows the path y = -16x² + 8x + 5 ?

A soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t² + 90t gives the height h of the ball after t seconds.

How many seconds will it take the ball to hit the ground?

A soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t² + 90t gives the height h of the ball after t seconds.

What is the maximum height of the ball?

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation

h(t) = -16t² +128t

When will the object reach its maximum height?