A cricket ball moves past an observer from left to right spinning counterclockwise. In which direction will the ball tend to deflect?
Question
A cricket ball moves past an observer from left to right spinning counterclockwise. In which direction will the ball tend to deflect?
Solution
The cricket ball will tend to deflect to the left. This is due to the Magnus effect, which describes the force exerted on a spinning object moving through a fluid (in this case, air). The counterclockwise spin of the ball will cause air to be deflected downwards on the right side of the ball (from the observer's perspective), and upwards on the left side. According to Newton's third law, the ball will experience an equal and opposite force, causing it to deflect to the left.
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