(a) define conditions under which linear momentum is conserved. (b) find the x - and y - components of the momentum of 3.85 kg object moving at 7.23 m/s at an angle of 134 degree with respect to the positive x - axis. (c) using the equation (5) from your laboratory manual, show that vpi = ro . √(g/2h). why was ro used to calculate this velocity?