Rain drops fall vertically at a speed of 20ms −1 . At what angle do they fall on the wind screen of a car moving with a velocity of 15ms −1 , if the wind screen velocity inclined at an angle of 23° to the vertical?

Question : Rain drops fall vertically at a speed of 20ms −1. At what angle do they fall on the wind screen of a car moving with a velocity of 15ms−1, if the wind screen velocity inclined at an angle of 23° to the vertical?

(A) 60°

(B) 30°

(C) 45°

(D) 90°

Answer : option (A)

Solution :

Rain drops fall vertically at a speed of 20ms −1. At what angle do they fall on the wind screen of a car moving with a velocity of 15ms−1, if the wind screen velocity inclined at an angle of 23° to the vertical?
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