Need help w/ Momentum & equation of motion please I was completely dumbfounded when i first read the question... How can a momentum problem like this ask for such a specific thing as the angle with which the object departed the ground? "At time t = 0, a ball is struck at ground level and sent over level ground. Figure 9-7 gives the magnitude p of the ball's momentum versus time t during the flight. (p1 = 7.0 kgm/s and the vertical axis is marked in increments of 2.0 kgm/s.) At what initial angle above the horizontal is the ball launched?" So I've tried finding the area under the graph (integral) to find my KG * m... but that doesn't seem to get me anywhere. I've also tried to find the slope to find acceleration (KG * m/s^2), but I don't see how that does me any good either... Any help, even how to approach the problem, would be much appreciated. Thank you.