Question

a target t lies flat on the ground 3m from the side of a building that is 10m tall, as shown above. a student rolls a ball off the horizontal speed with which the ball must leave the roof if it is to strike the target moest nearly?

Answer 1

how long does it take to fall 10m?

Then, using that value of t, solve for v in

vt = 3

since the ball must travel horizontally for 3m in that amount of time.

Answer 2

1.41