Results Table Tennis Tangent/Circle/Angles-Please give short math explanation/lesson?
I am trying to measure the angle of the line you would draw from 3 o clock to 2 o clock, and 2 o clock to 1 o clock. Measured on a piece of paper, I got the result of 35 degrees for 1-2 and 65 degrees for 2-3. I don't remember the geometry required to do this and how you can use the angle of 2 o clock from the center to find the angle of the line drawn between 2 o clock and 3 o clock, so I am doubting if I have even measured the angles correctly, but would also wish to have a geometry refresher. Just short on time to think of it myself
I know I just explained it in much more complicated words without using math terms, but for your enrichment, these would be guideline angles to use to hit a ball with a paddle during table tennis/ application of spin, etc. - for you to think about! The lines for 3 o clock and 4 o clock and 4 o clock and 5 o clock should also be included in the table tennis lesson.
Thanks.
30 deg each
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Table Tennis Video News: 2011 Chinese Super League Round 4 Results
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I saw today a video with Bruce Lee playing ping-pong with some other Chinese guy and Bruce was using a nun-chack instead of the regular ping-pong bat. And Bruce was beating the other guy.
Can this be true or it was a well done fake?
It could be fake, but I think that Bruce Lee could have done that if he wanted to, whether or not he did i'm not sure.
Tennis Paddle Bat Effect of Spin on the Outgoing Velocity of a Ball After a Bounce?
I'm developing a bat-and-ball themed game in which a player can move his or her paddle to give spin to the ball. The problem I face is now is understanding how spin affects the ball's bounce. No, I'm not talking about how topspin will make the ball jump forward or backspin will cause the ball to slow. That much can be found experimentally by anyone. I want to know the actual physics formulas and/or concepts involved, so I can make my game as realistic as possible.
I've done plenty of searches for this topic but cannot find anything. I posted on GameDev.com and out of the 6 answers that have turned up so far, none of them address the issue directly. I just get links to websites dealing with table tennis and tennis physics, and links to definitions of dynamic friction and what not. I've LOOKED THROUGH ALL OF THEM, and still cannot understand the exact effect of spin on the outgoing velocity of the ball after a bounce.
Hope someone can help!
Thanks,
Rahul
Imagine a ball approaching a bat from the right and above the bat so that the angle of the line of centers at contact time is α. Then the tangential force at the contact point will be Ft = (Fc)sinα*cosα.
The torque exerted by the bat (assumed to be torsionally stiff) on the ball is T = Ft*Rb and the resulting angular impulse is L = T*t where t is the time interval over which the torque is applied.
The greater the angle, the less linear momentum change and the more angular momentum change will affect the dynamics of the ball.....
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