1. You push on the ground which pushes back which makes you move.
2. The football player has more mass then the ballerina. The football player hits the ballerina and she will probably move away from the football player.
3. When the bat hits the ball the force from the bat is transferred to the ball which makes it go in the opposite way.
4.When a ball rolls down the ramp and hits another ball at the bottom that is one example that is in my project. When my hand pushes the ball to the ramp that is another example I have so far in my project.
Write something about yourself. No need to be fancy, just an overview.