Before starting this problem, review Conceptual Example 3 in your text. Suppose
ID: 2258460 • Letter: B
Question
Before starting this problem, review Conceptual Example 3 in your text. Suppose that the hail described there comes straight down at a mass rate of m/?t = 0.070 kg/s and an initial velocity of v0 = -13 m/s and strikes the roof perpendicularly. Suppose that the hail bounces off the roof of the car with a velocity of +13 m/s. Ignoring the weight of the hailstones, calculated the force exerted by the hail on the roof.1 N Before starting this problem, review Conceptual Example 3 in your text. Suppose that the hail described there comes straight down at a mass rate of m/?t = 0.070 kg/s and an initial velocity of v0 = -13 m/s and strikes the roof perpendicularly. Suppose that the hail bounces off the roof of the car with a velocity of +13 m/s. Ignoring the weight of the hailstones, calculated the force exerted by the hail on the roof.
1 N
Explanation / Answer
Force exerted by hail(F)=change in momentum/time
=m(v-u)/delta t
=(m/delta t)*(13-(-13))
=(0.07)*26*9.8
=17.836 N