i really have no clue what to do in this problem since theres a measurement for the dent...what formula am i supposed to use for this???? 4. During an autumn storm, a 0.012kg hail stone traveling at 20.0m/s made a 0.20 cm deep dent in the hood of Darnell’s new car. What average force did the car exert to stop the damaging hail stone? so far i understand: mass= .012kg velocity= 20 m/s and then theres the .20 cm deep dent but i dun knoe whats that need for?