Trying to think of a new topic about which to blog I somehow remembered seeing this video and thought it only appropriate after finishing the unit on oskillaiton. Inspired by the Tacoma Bridge collapse (1st video) Shawn Frayne designed a small wind generator that uses an oskillating tensioned belt to generate energy from the wind (2nd video).
Today, as I was working on the Rotational Motion WebAssign, I remembered that if you drop a spinning basketball, it will bounce back up spinning in the opposite direction. I tried to wrap my head around it and hoped that application of some physics knowledge would reveal the odd phenomenon. So let's check out our basketball:
The ball has:
- an angular velocity ω
- a mass m (of 0.6kg!)
- a radius r (of 0.119m!)
- a moment of inertia i of 0.00569kg*m^2 (A basketball does have air in it but w
So as I was chugging along on the Rotational Motion WebAssign I was startled to notice a seemingly coincidental relationship between my givens and my answer. But after, procrastinating longer than is healthy, trying it with other numbers, the relationship was consistent.
This pertains to question 2 on the WebAssign. I found that, for a record on a turntable with an initial rpm that slows with a constant angular acceleration until rest in time t in minutes, the nu
One of the most important things to remember when golfing is the ever important Phollow Through. As you can see in the video, Phollowing though increases the time the driver is in contact with the golf ball. Remember that Jimpulse = FΔt = mΔv. Both the average force F and the mass of the golf ball m are constants so increasing the duration t of the Jimpulse will increase the velocity v of the golf ball. Furthermore, if one does not Phollow Through th
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