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Delucha
Posts: 43
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6/25/2013 11:07:57 AM
Posted: 3 years ago
If you throw a spinning baseball, does one side of the baseball ( i.e. Top half when top spin) have more moment than the other half because you could add the tangential velocity to the actual velocity of the ball?
If so, does that logic apply to earth's momentum?
Poetaster
Posts: 587
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6/25/2013 1:12:01 PM
Posted: 3 years ago
Yes, it also applies to anything in simultaneous rotary and translational motion: the separate velocity vectors from each of the contributions add up component-wise, and so does the associated momentum.

In fact, this is one reason why tornado destruction can be so selective: if a tornado is advancing linearly at 40 km/h, and spinning with the same tangential speed, then a house which is grazed by the tornado, on the side that the storm's tangent and linear velocity vectors are directionally opposed, will experience a net wind speed, for that brief moment, of 0 km/s. A house on the exactly opposite side, where the vectors add up, will be hit with 80km/h winds!
"The book you are looking for hasn't been written yet. What you are looking for you are going to have to find yourself, it's not going to be in a book..." -Sidewalker