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sensesfail
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Homework Statement
During an autumn storm, a 0.012 kg hail stone traveling at 20 m/s made a .20 cm deep dent in the hood of a person's car. What average force did the car exert to stop the damaging hail stone?
Homework Equations
d = vt
ft = mv
The Attempt at a Solution
Vav = (Vf + Vo)/2 = (0 + 20)/2 = 10 m/s
V = 10 m/s
d = 0.002 m
t = d/v = 0.002/10 = 0.0002 seconds
m = 0.012kg
delta v = 20 m/s
t = 0.0002 seconds
f = mdeltav / t = (0.012 * 20) / 0.0002 = 1200 N