Explanation for 1-6 please!

1. 2. Explain in full the difference between elastic. inelastic. and perfectly inelastic collisions. A ball of mass 0.156 kg is dropped from rest from a height of 1.24 m. It rebounds from the floor to reach a height of 0.9?5 rn. What impulse was given to the ball by the floor? A 121] kg bullet is fired into a stationary block of wood (m = EDD kg). The bullet imbeds into the block. The speed of the bullet-plus-wood combination immediately after the collision is 1.10 ml's. What was the original speed of the bullet? A 4?.0 kg girl is standing on a plank that has a mass of 145 kg. The plank. on'ginally at rest. is free to slide on a frozen lake that constitutes a at. frictionless supporting surface. The girl begins to walk along the plank at a constant velocity of tea rrv's it relative to the plank. a} What is her velocity relative to the ice surface? b] What is the velocity of the plank relative to the ice surface? Hint: this is a conservation of momentum problem, and you need to solve 2 equations A neutron in a nuclear reactor makes an elastic head-on collision with the nucleus of a carbon atom initially at rest. a} What fraction of the neutron's kinetic energy is transferred to the carbon nucleus? b] The initial kinetic energy of the neutron is 1.60 x 10-13 J. Find its nal kinetic energy and the kinetic energy of the carbon atom after the collision. Note: The mass of the carbon nucleus is nearty 12.0 times the mass of a neutron. A 131] g wad of sticky clay is hurled horizontally at a 220 g wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact. the block slides 6.50 m before coming to rest. If the coefficient of friction between the block and surface is .B4D. what was the speed of the clay immediately before impact