In laboratory situations, a projectiles range can be used to determine its speed. To see how this

Question:

In laboratory situations, a projectile’s range can be used to determine its speed. To see how this is done, sup-pose a ball rolls off a horizontal table and lands 1.5 m out from the edge of the table. If the tabletop is 90 cm above the floor, determine
(a) The time the ball is in the air, and
(b) The ball’s speed as it left the table top.