Final answer:
The impulse-momentum bar chart that best represents the process of a tennis ball bouncing back at half its original speed after being thrown against a wall is option b) →↙.
Step-by-step explanation:
The impulse-momentum bar chart that best represents the process of a tennis ball bouncing back at half its original speed after being thrown against a wall is option b) →↙.
When the tennis ball collides with the wall and bounces back, its momentum changes in the opposite direction. The negative x-direction represents the change in momentum, and the decrease in speed indicates a decrease in momentum. Therefore, the bar chart →↙ accurately represents the change in momentum for the system consisting only of the tennis ball.