Alexandria (50-kg) and Frederick (70-kg), both on roller skates, push off each other abruptly. Each person coasts backward at approximately a constant speed. Alexandria moves at 4-m/s. Find the speed that Fredrick moves. Also, draw momentum diagrams. props to whoever knows how to do physics

Two wooden members of 80 × 120-mm uniform rectangular cross section are joined by the simple glued scarf splice shown. knowing that β = 22° and that the maximum allowable stresses in the joint are, respectively, 400 kpa in tension (perpendicular to the splice) and 690 kpa in shear (parallel to the splice), determine the largest centric load p that can be applied using mohr's circle. (round the final answer to two decimal places.)