Question

Wind blowing from south at 10m/s but to a cyclist it appears to be blowing from east at 10m/s. What is the velocity of cyclist

Answer 1

10m/s E->
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Answer 2

As he is not able to feel the breeze from south then he might be moving at 10ms(-1) TO THE NORTH .
He is also facing the breeze from east
Therefore he is also moving to east with 10m/s
Then the question becomes easy as we just have to resolve the two vectors
By formula
√a'2 +b'2 +(2abCos(theta))