Force & Motion Crossword Across Down 6. As well as changing the speed of a car a force can also change its .... 8. Do this to mass and acceleration to get force 10. The acceleration in m/s/s produced by a force of 36N on a mass of 4kg 11. Pairs of forces often act in ******** directions 13. Force up when seven down is combined with ten up 14. A push or a pull 16. Force is measured in.. 18. Force pairs are often ***** in size 19. A type of force that pulls down 20. The path taken by a body which is not acted on by a force 1. A motion effect of a force 2. If there are no forces on a body it can move at a constant .... 3. Newton's first name 4. The mass in kilograms that will accelerate at 2 m/s/s when a force of 10N is applied 5. A type of force that causes objects to slow down 7. Air **********, a type of frictional force 9. The force in newtons required to make a mass of 500g accelerate by 8 m/s/s 12. The type of force between a person and the chair they are sitting on 15. Mass must be measured in these in the equation F=ma 17. Force divided by acceleration