Answer to Question #101427 in Physics for Antonio

Question

a ball is thrown from a 128ft high balcany with the initial velocity of 32ft / sec the height of the ball can be molded by the function h (t) = -t squared +32t +128

when will the ball be at the highest point amd how high is that point how long will it take to reach the ground?

Answer 1

At the highest point:

$$v(t)=-2t+32=0$$

$$t=16\ s$$

$$H=-16^2+32(16)+128=384\ ft$$

The time to reach the ground:

$$h=0\to -t^2 +32t +128=0$$

$$T=35.6\ s$$