A particle is projected towards north with speed 20m/s at an angle 45º with horizontal. Ball get horizontal acceleration of 7.5 m/s 2 towards east due to wind. Range of ball (in meter) minus 42 m will be –
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Ans. 8
Sol. Time of flight: T = 
= 
sec
Range (along north) = 
= 40 m
Range (along east) = 
aT 2 = 30 m
Range = 
= 50 m
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