A billiard ball rolling across a table at 1.70 m/s makes a head-on elastic collision with an identical ball. Find the speed of each ball after the collision when each of the following occurs. (a) The second ball is initially at rest. first ball      ?m/s second ball      ?m/s (b) The second ball is moving toward the first at a speed of 1.10 m/s. first ball      ?m/s second ball      ?m/s (c) The second ball is moving away from the first at a speed of 0.95 m/s. first ball      ?m/s second ball      ?m/s

Consider two hockey pucks, each with mass 1.25 kg, on frictionless ice. Puck A is initially moving due east at 2.35 m/s towards puck B, which is initially stationary. The pucks collide head on. After the collision, puck B moves east with a speed of 1.45 m/s. (a) What is puck A's speed (in m/s) after collision? What direction is it moving in? (b) How much kinetic energy (in Joules) is lost from the system during the collision? (c) If the collision were completely elastic, what would the final speed and direction of each puck be?

A penguin of mass 6kg swims with a velocity of 1.79 m/s in the +x direction. The penguin then glides onto a small chunk of ice of mass 2000kg initially at rest. What is the final velocity of the ice and the penguin together?

Consider two objects on a collision course. Object 1 has a mass of (35 kg) and is initially moving with a velocity of (3 m/s ˆx). Object 2 has a mass of (22 kg) and is initially moving with a velocity of (5 m/s -ˆx).a) If the objects collide inelastically and stick together, what is their post-collision speed?b) If the collision occurs over a time of (0.05 s), what is the force that the objects experienced?c) If the objects instead collided elastically, what is the final speed of each object?