![]() I get a report from NASA each day to let me know the optimum performance parameters for the day. I play generally at no more than 200 feet above sea level so altitude is not a consideration.Ģ. Then I found a picture of a golf ball in a drink glass and decided to post that instead.ġ. Interaction with the ground: I thought really hard about this one and had a multitude of ways to answer your question. Unlike some websites Golf Digest accepts big company money so you know it has the best answers for everything!ģ. Temperature: Searched on Golf Digest, the authority in all things related to science and golf. ![]() Altitude: I've designed a propietary device to measure the differences in altitude and the flight of golf balls. I look forward to your responses - you have 90 minutes from the time you read this to complete.ġ. ![]() To make it easier, assume the ball is incompressible compared to the impact object (not true for cart path or tree, of course) and that the moisture content of the soil is constant. Given it is also likely there are differences in agronomy (tightly mowed fairways versus relatively shaggy with different types of grass), please account for the resistance of the grass blades (length and type) in your roll calculations. For extra credit, combine this solution with 1).ģ) How is the COR of each ball interacting with the ground being considered? I'm sure there is a difference in the bounce and roll of the balls on red Georgia clay versus more sandy soil. For simplicity, assume the COR of the ball changes linearly with temperature, although this is not true. To get you started, assume the drag force is proportional to the square of the velocity by a constant related to the cross-sectional area of the spheroid. It's also well known that oblate spheroids (there no such thing as a truly perfect sphere) fly further in humid air as water molecules displace nitrogen and oxygen, making the air less dense and providing a smaller drag force. In particular:ġ) How are you guys accounting for altitude? Show your work.Ģ) Temperature and humidity? It's winter in New Zealand and, I assume, approaching ungodly hot in the Southeast. Are these factors being taken into consideration for the challenge to make the comparisons fair? If not, they should be. So I have questions for the competitors and perhaps STUDque - We have participants all over the world at different altitudes with different weather patterns and soil conditions.
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