1. The problem statement, all variables and given/known data Two average forces. A steady stream of 0.250 kg snowballs is shot perpendicularly into a wall at a speed of . Each ball sticks to the wall. Figure 9-49 gives the magnitude F of the force on the wall as a function of time t for two of the snowball impacts. Impacts occur with a repetition time interval , last a duration time interval , and produce isosceles triangles on the graph, with each impact reaching a force maximum . During each impact, what are the magnitudes of (a) the impulse and (b) the average force on the wall? (c) During a time interval of many impacts, what is the magnitude of the average force on the wall? 2. Relevant equations 3. The attempt at a solution a J=Favg*t 200N/2*.01seconds=1kgm/s J=Δp=0-.25kg*4m/s= -1 kgm/s The impulse should be positive since its asking for the impulse on the wall and not the snow ball correct? I should have had .25kg*4m/s-0= 1 kgm/s ? b, Since the graph is of isosceles triangles I can just divide the max F by 2 to get 200N/2=100N Or use: Favg=m*v/t =(.250kg*4m/s)/.01s =100 N c. should just be the maximum force divided by the time interval between the peak of two impacts? 200N/.05s 4000N/s?