Before starting this problem, reviewConceptual Example 3 in your text. Suppose t

Question

Before starting this problem, reviewConceptual Example 3 in your text. Suppose that the hail describedthere comes straight down at a mass rate ofm/t = 0.060kg/s and an initial velocity of v0 =-10 m/s and strikes the roofperpendicularly. Suppose that the hail bounces off the roof of thecar with a velocity of +10
1 m/s. Ignoring the weight of the hailstones, calculated theforce exerted by the hail on the roof. ____________N

Explanation / Answer

we know that impulse J = F.t = m (Vi - Vo)                      ==> Force F = (m / t) ( Vi - Vo )                                            = (0.060) * ( 10 - (-10) )                                            = 1.2 N

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