two hockey pucks with mass 0.1 kg slide across the ice and collide. before the collision, pick 1 is going 13 m/s to the east and pick 2 is going 18 m/s to the west. After the collision, puck 1 is going to 18 m/s to the west. What is the velocity of puck 2?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.