1. The problem statement, all variables and given/known data "Think of a rainstorm. Each raindrop hits your roof, exerting a certain amount of force for a short time until it comes to a stop. Now think of a hailstorm instead. All of the raindrops are now hard little ice pellets of the same size and mass. Using common sense and what you know about momentum, how would the total force of the hailstorm striking the roof of your house compare to the equivalent rainstorm." 3. The attempt at a solution I was POSITIVE that the force would be the same, since both the size and mass are the same and it seems like it's assumed that velocity is the same as well. However, that was the incorrect answer. Momentum = mv I'm not sure if it's even possible to find out the velocity of each particle, as it doesn't give any information on how they're different in velocity, only that they're the same mass and size- therefore the same drag constant and weight.