About
For Teachers
- ping.wmv
- ping-frame2.gif
- ping-frame1.wmv
- ping-frame.wmv
- ping-frame.gif
Software Requirements
| Android | iOS | Windows | MacOS | |
| with best with | no | no | need Java |
need Java |
| support full-screen? | no | no | Yes | Yes |
| cannot work on | no mobile browser understand Java.... |
no mobile browser understand Java.... | install Tracker from http://physlets.org/tracker/ |
install Tracker from http://physlets.org/tracker/ |
Credits
Author: Ning video, Loo Kang model
Contact: This email address is being protected from spambots. You need JavaScript enabled to view it.
end faq
Version
http://weelookang.blogspot.sg/2016/08/ping-pong-ball-rebounce-model.html
Ping Pong Ball Rebounce Model
Model building Process
Select Dynamic Model Cartesian, propose inital model say Fy = -mg
add parameter g = 9.81 since assume m =1 by default
determine vy when t=0, which is found via analysis to be vy = -0.6
Fy = -mg-kvy where kvy is drag force
fine tune value of k until match data k is found to be k = 1.11
this completes the fall under drag model
to add the rebounce force
propose computational thinking, if (t< thitground , true, false )
nestted if statements to achieve answer
can you get the same model?, need to assume contact time of 0.02
the model suggests contact force is 390 N for a mass of ping pong m=1kg
if ping pong mass is measured, just key in to find the contact force.
enjoy!
end faq
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- Details
- Written by Loo Kang Wee
- Parent Category: 02 Newtonian Mechanics
- Category: 02 Dynamics
- Hits: 3920