I saw a video of a windmill a few minutes ago and they are quite fast.
But then i thought “Is the tip of the rotorblade as fast as the the point furthest in the middle?”
Let me explain the best i can:
So if you move 10km/h, after 1h you are 10km farther than before. Thats logical.
But with regards to the rotor blade, the point furthest in the middle moves less far than the one all the way outside.
Does that mean that the points move at different speeds even though they’re part of the same body?
Where is my mistake in thinking?
In: Engineering
Speed is relative, so it depends what you’re comparing it to, but yes, compared to the surrounding air the tip will be moving faster than would a point closer to the center.
This principle also explains why songs on the outer tracks of old vinyl records can sound better than those printed near the middle (constant angular velocity). And also how gear systems work. ⚙️
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