Concept #1: Push-Away Problems
Practice: An 80-kg astronaut is floating in space is 30 m away from his spaceship. He wants to return to his spaceship in 10 s. With how much speed must he throw his 2-kg space hammer, directly away from the spaceship, to accomplish this?
Example #1: More Push-Away Problems
Example #2: More Push-Away Problems
Example #3: Walking on a Canoe