How do I build (safe and legal)a tennis or golf ball cannon?

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1. How’d you explain the phenomenon of the “curve ball” in sports like tennis, baseball, golf or cricket? In many games like cricket, golf, tennis and baseball, we notice that a spinning ball deviates from its parabolic trajectory as it moves through air. I know that this deviation can be partly explained on the basis of Bernoulli’s principle, I already have text regarding this topic, I was just wondering if someone could explain […]...
2. What makes a golf cart be street legal in california? I have a golf cart with blinkers and lights and i was wondering what else i have to have before its street legal....
3. Is it legal for kids to drive golf carts? I know the legal age is 16, but what about the neighborhood sidewalk? My 13 year old is really responsible. We’re going to get him a golf cart and hopefully find a place to legally drive it. Any suggestions?...
4. Tennis Elbow and Golf Elbow Tennis elbow and golf elbow, are both forms of tendonitis. Golf elbow is an inflammatory condition of the elbow which in some ways is similar to tennis elbow. In terms of prevention and treatment it is recommended exercises to strengthen your forearm muscles and elbow. Use light weights or squeeze a tennis ball or exercise […]...
5. Build Your own Golf Equipment – The Easiest Set of Golf Clubs to Build with Steel Shafts Depending on what kind of golfer you are and how well you want your clubs to match will depend on what kind of assembling equipment you need. Components are manufactured well enough so that even with very basic knowledge and skills, you can build a very nice looking and great performing set of golf clubs […]...