Question

Example: A ball rolls off a table 1.5 m high and lands 0.80 m away from the table.

(a) How long will the ball be in the air?
(b) What is the ball's initial horizontal velocity?
(c) What will be the ball's horizontal and vertical velocities when it hits the ground?

Answer 1

Below

Step-by-step explanation:

To fall 1.8 m the time will be found with :

d = 1/2 a t^2

1.5 = 1/2 ( 9.81) t^2 shows t = .55 s

in this .55 s it travels .8 m horizontally

Horizontal velocity = .8 m / .55 s = 1.45 m/s

When it hits the ground , horizontal velocity will still be 1.45 m/s

vertical velocity will be v = at = 9.81 m/s^2 * .55 = 5.42 m/s