Suppose that the ball in Figure 3.1la is projected from a height of \(25.0 \mathrm{~m}\) above the ground and is thrown with an initial horizontal velocity of \(8.25 \mathrm{~m} / \mathrm{s}\).

(a) How long is the ball in flight before striking the ground?

(b) How far from the building does the ball strike the ground?
THINKING IT THROUGH. In looking at the components of motion, we see that part

(a) involves the time it takes the ball to fall vertically, analogous to a ball dropped from that height. This time is also the time the ball travels in the horizontal direction. The horizontal speed is constant, so the horizontal distance requested in part

(b) can be found.

(a) How long is the ball in flight before striking the ground?

(b) How far from the building does the ball strike the ground?