Conservation of Momentum. Answer these question F2.1 to F2.6

Two masses, called Ale and Beth, collide and stick together under four different circumstances, as shown in the four rows of the table below. Cal- culate the missing measurements: Before collision After collision Alfie's Alfie's Velocity mass [kg velocity [m s'1 ' '1 F2.5 Charlie is driving her 20000 kg bus. She stops at a roundabout. Percy is driving his 750 kg Corsa at 15 m s'1 behind her. He fails to stop and rams into the back of the bus, sticking to it. The impact releases the brakes on the bus. How fast will the smashed up wreck be travelling immediately after the collision? F2.6 A neutron (mass = 1 u) is moving at 300 m s'1 when it smacks into a stationary 235U nucleus (mass = 235 u), and sticks to it. What will the velocity of the combined particle be