Winter Break - Ping Pong Balls

Since I actually hardly participate in any outdoor activities because I don't think they are fun and I do not have any friends who participate in outdoor activities and my parents are also not interested in them as well, the only thing I could do was to walk to the department store across the street, spend RMB ￥2 (approx. USD $0.31) to buy a ping pong ball, and throw the ball towards the wall in my home, which if done outdoor, would be an outdoor activity (just pretend that it is outdoor).

After I threw the ball, it first bounced against the wall, and then bounced against the ground. 

At 0s, I threw the ball towards the left.

Then at 0.367s, it bounces against the wall and turned right.

At 0.567s, the ping pong ball bounces off the ground.

The last data point is at 1.00s

The list of data is as shown:

The X and Y velocity are automatically generated by Logger Pro. I calculated the ping pong ball's velocity by the formula sqrt(x^2+y^2).

From this, I can get the average velocity of the ball. However, since there are two turning points of the ball, it is better to calculated the velocities separately.

Between the time I threw the ball and the time it hits the wall, the average velocity is 5.765m/s. 

The average velocity between the ball hits the wall and it hits the ground is 4.669m/s.

The average velocity between the ball leaves the ground and the end of the recording is 2.816m/s.

By using the formula d/dx(v), where v is magnitude of velocity, I calculated the initial acceleration of the ball, which is 6.755m/s^2. The list of acceleration is as below: