Tracker tennis ball re-bounce force and air drag

Tracker tennis ball re-bounce force and air drag

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

tennis ball projectile motion
g = 9.81

fx = 0 , fy = g

authors: li_anqi , model lookang

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

tennis ball projectile motion

fx = 0 , fy = g

authors: li_anqi , model lookang

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

tennis ball re-bounce force and no air drag

g = 9.71

fx = if(t<t1,0,if(t<t2,vw,0)) , fy = if(t<t1,-m*g,if(t<t2,vu-m*g,-m*g))

authors: li_anqi , model lookang

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

tennis ball re-bounce force and no air drag

g = 9.71

fx = if(t<t1,0,if(t<t2,vw,0)) , fy = if(t<t1,-m*g,if(t<t2,vu-m*g,-m*g))

authors: li_anqi , model lookang

vu is force imparted on the ball by the wall in the x direction

vw is force imparted on the ball by the wall in the y direction, also known as friction

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

lookang tennis ball re-bounce force and air drag

k = 1.5 , g = 9.71

fx = if(t<t1,0,if(t<t2,Rx,-k*vx))  , fy = if(t<t1,-m*g,if(t<t2,Ry-m*g,-m*g-k*vy))

authors: li_anqi , model lookang

http://weelookang.blogspot.sg/2015/05/tracker-tennis-ball-re-bounce-force-and.html

lookang tennis ball re-bounce force and air drag

k = 1.5 , g = 9.71

fx = if(t<t1,0,if(t<t2,Rx,-k*vx))  , fy = if(t<t1,-m*g,if(t<t2,Ry-m*g,-m*g-k*vy))

authors: li_anqi , model lookang

Rx is contact force with the basketball panel in the x direction
Ry is contact force with the basketball panel in the y direction, also known as friction