physical science
posted by wendell .
During a rain storm, rain comes straight down with a velocity 15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is .060 kg every second. Assuming that the rain cones to rest upon stiking the car (Vf =0m/s), fund the average force exerted by the rain on the roof during a 3 second time interval.

physical science 
bobpursley
force*time=change (mass*velcocity)
force*3=.060*3*15
solve for force.
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