a) The product FAt - impulse - is a good characteristic of the effect of actual force in the time interval At, see Figure 8.2. Determine the u of the impulse. b) If we consider the change of linear momentum, the corresponding "flo quantity is the impulse I := FAt: P1 mou P2 Choose either + or - and explain why. (c) With these stock-flow relation, discuss the condition (s) for linear mom tum conservation