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1st Equation of Motion

A boy riding ...

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A boy riding a bicycle with a speed of 4m/s towards east direction , observes rain falling vertically downward. If he increases his speed to 8m/s, rain appears to meet him at 45^0 to the vertical . The speed of rain with respect to ground is (1) 8 m/s (2) 4 m/s (3) 4\sqrt2 m/s (4) 2 m/

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1st Equation of Motion

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