physicsmom

1. Two freight cars, each with a mass of 3.0 x 10^5 kg, collide in an inelastic collision. One was initially moving at 2.2 m/s and the other was at rest. What is their final speed? A 0.105 kg hockey puck moving at 24 m/s is caught and held by a 75 kg goalie at rest. With what speed does the goalie slide on the ice after catching the puck? A .50 kg ball traveling at 6.0 m/s collides head on with a 1.00 kg ball moving in the opposite direction at9.0 m/s After colliding, the 0.50 kg ball bounces backward at 14 m/s. Find the other ball’s speed and direction after the collision. An astronaut at rest in space fires a thruster pistol that expels a quick burst of 35 g of hot gas at 875 m/s. The combined mass of the astronaut and pistol is 84 kg. How fast and in what direction is the astronaut moving after firing the pistol? Ryan and John row their canoe alongside a dock. They stop the canoe, but they do not secure it. The canoe can still move freely. Ryan, who has a mass of 80 kg, then steps out of the canoe with a speed of 4.0 m/s onto the dock, causing the canoe, with John still in it, to move also. At what speed and in what direction does the canoe move if their combined mass is 115 kg?