sports and graph
1. up and down(gravity)
2. acceleration
3. ball
4. reaction force
5. soccer and graph
6. tennis
7. table tennis(ping pong)
8. basketball
9. baseball
10. badminton
11. archery
12. bowling
13. ski
kyleroh, 2016年5月7日
각각의 스포츠와 그와 관련된 그래프들의 모양, 원리, 공