Discussion Forum : Physics
Question -
Rain drops fall vertically at a speed of 20 m/s . At what angle do they fall on the wind screen of a car moving with a velocity of 15 m/s if the wind screen velocity inclined at an angle of `23^circ` to the vertical ?`(cot^-1 4/3 = 37^circ)`
Answer: Option A
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`tan (90^circ - theta) = 20/15`
`:.` ` cot theta = 20/15` = `4/3`
`rArr theta = 37^circ`
`:.` `alpha = 37^circ + 23^circ` = `60^circ`
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