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A glass wind screen whose inclination with the vertical can be changes is mounted on a car. The car moves horizontally with a speed of 2m/sec. At what angle theta with the vertical should the wind screen be placed so that the rain drops falling vertically downwards with velocity 6 m/sec strike the wind screen perpendicularly?
take upwards as j and direction of motion of car as ifind the velocity of rain wrt car Vrc=Vr-Vc =-6j-2i now 3i-j is vector perpencicular to given vectorthe acute angle made by the above vector with vertical is tan-1(3)note:the above question can be done easily with digram but the system dosnt provide us this option PLEASE APROOVE
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