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Across 6. when a force causes an object to move in the same direction of a force 7. when the net force is zero, it causes no motion 10. an object's change in motion relative to reference point 12. helps make work easier 14. straight slanted surfaces that spreads work out over distance 16. the accelration of an object depends on mass of the object and force applied to it 18. an object that appears to stay in position relative to object being observed for motion 20. accelration in which velocity decreases 22. transfer of energy by not a direct touch 24. force that oposses motion 25. energy of position or shape of teh object 26. an object at rest and an object in motion tends to stay what they are doing unless acted upon by an unbalanced force 27. a bar that piviots at a fixed point and changes the size and direction of the force 28. transfer of thermal enerrgy by movement of liquid or gas 29. grooved wheel that holds a rope or cable and changes the direction of the force 30. tendancy of all objects to resist any change in motion 31. energy of motion

Down 1. law that states energy is neither created nor destroyed 2. the distance travelled divided by time interval during the motion occurred 3. how much matter an object has 4. transfer of thermal energy by a direct touch 5. when the net force is other than zero, causes motion 8. total velocity of two moving objects 9. accelration in which velocity increases 11. how much machine helps do the work 13. when an object exerts force on second object the second one exerts the equal amount of force in oppossing direction on first one 15. the rate at which velocity changes 17. the speed of an object in particular motion 19. total energy of particle that makes up an object 21. the energy of compond that changes as it's atoms are arranged to form new componds 23. measure of gravitational pull