A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of `2m//s`. At what angle `alpha` with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity `6m//s` strike the wind screen perpendicularly?A. `tan^(-1)(1//3)`B. `tan^(-1)(3)`C. `cos^(-1)(3)`D. `sin^(-1)(1//3)`

A glass wind screen whose inclination with the vertical can be changed

1.	A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of `2m//s`. At what angle `alpha` with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity `6m//s` strike the wind screen perpendicularly?A. `tan^(-1)(1//3)`B. `tan^(-1)(3)`C. `cos^(-1)(3)`D. `sin^(-1)(1//3)`
Answer» Correct Answer - B

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