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Across 1. the force which is unbalanced and therefore causes a change to a state of motion 4. the pulling or stretching force on a spring 5. the resistance an object has to change its state of motion 7. the Vector sum of all of the forces acting on an object 8. name for hit and bounce collision 9. law of motion that states that an object acted on by a net force will accelerate in the direction of that force 10. fluid friction or air resistance 15. the friction force before the box I push starts to move 18. rate of change due to gravity 19. falling under the force of gravity only 20. mass x velocity

Down 2. momentum before collision is always equal to momentum after collision 3. force that resist motion 6. name for hit and stick collision 11. the apparent outward force that draws a rotating body away from the center of rotation 12. force that keeps an object moving in a circle 13. law of motion that states that forces act in equal but opposite pairs 14. measures the distance and direction from a starting point to an ending point 16. a push or a pull 17. can change when the force of gravity changes