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Relative Motion in 1D

Wind is blowi...

Question

Wind is blowing in the north direction at speed of $2 m / s$ which causes the rain to fall at some angle with the vertical. With what velocity should a cyclist drive so that the rain appears vertical to him?

A

2 m / s^{- 1}

south

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B

2 m / s^{- 1}

north

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C

4 m / s^{- 1}

west

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D

4 m / s^{- 1}

south

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Solution

The correct option is D $2 m / s^{- 1}$ north
He must travel with the same velocity as the wind $= 2 m / s$ in the direction same as wind so that velocity of rain relative to him becomes vertical.

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