2 An object at rest will remain at rest, and an object in motion will stay in motion with the same speed and direction unless acted on by an unbalanced force.2. The acceleration of an object is equal to the net force acting on the object divided by the object’s mass.3. When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.
3 4. A (1st law) 5. Gravitational force is pulling the hanging down, but it is balanced by the table pushing the nail up. 6. They will accelerate away from each other. 7. 3rd law 8. 1st law
5 12. 13. 1st law 14. The car, because it has less mass. 15. 2nd law 16 st law 14. The car, because it has less mass nd law 16. Twin pushed by parent because parent pushes with more forceActionReaction
6 17. 2nd law 18. 3 N to the right 19. 2 N up 20. 2 N up 17. 2nd law N to the right N up N up. The box doesn’t move left or right because F3 and F4 are balanced.