During a rain storm, rain comes straight down with a velocity Vi = -15 m/s

Question

During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 kg every second. Assuming that the rain comes to rest upon striking the car (Vf = 0 m/s), find the average force exerted by the rain on the roof during a 3 second time interval.

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General Physics PRemastered 1 year 1 Answer 455 views 0

Answer ( 1 )

  1. Force is change in momentum of rain = 0.06 * 15 = 0.9 N

    The answer would remain same for any time interval since its asked average.

    I used m *change in velocity per unit time = 0.06 kg/sec * 15 m/s = 0.9N

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