Thursday, May 21, 2015

Tracker tennis ball re-bounce force and air drag

Tracker tennis ball re-bounce force and air drag

tennis ball projectile motion
tennis ball projectile motion
g = 9.81
fx = 0 , fy = g
authors: li_anqi , model lookang

tennis ball projectile motion
tennis ball projectile motion
fx = 0 , fy = g
authors: li_anqi , model lookang

tennis ball re-bounce force and no air drag
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

tennis ball re-bounce force and no air drag
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


Tracker lookang tennis ball re-bounce force and air drag
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

Tracker lookang tennis ball re-bounce force and air drag
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