Question

mary is playing ping pong and serves the ball to her friend. the ball travels through the air and bounces off the table. just before the bounce, the ball has a horizontal velocity of 6.0 meters per second and a vertical velocity of -1.1 meters per second. after the bounce, the ball has a horizontal velocity of 5.9 meters per second and a vertical velocity of 1.0 meters per second.
what is the change in the balls velocity after it bounces?
the change in the balls velocity has an x-component of meters per second and a y-component of meters per second.

Explanation:

Step1: Calculate x-component change

$\Delta v_x = v_{x,\text{after}} - v_{x,\text{before}} = 5.9 - 6.0$

Step2: Calculate y-component change

$\Delta v_y = v_{y,\text{after}} - v_{y,\text{before}} = 1.0 - (-1.1)$

Answer:

The change in the ball's velocity has an x-component of $-0.1$ meters per second and a y-component of $2.1$ meters per second.