A particle having mass m and charge q is projected at an angle of 75° – InterviewSolution

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1.	A particle having mass m and charge q is projected at an angle of 75° to the horizontal with a speed u. A uniform electric field `E=(mg)/(q)` exists in horizontal direction. Find the time after projection when the velocity of particle makes an angle of 45° with horizontal.
Answer» Correct Answer - `u/(2sqrt(2g))`

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