1. I) The Laws of Motion

2. A) Galileo showed that a moving object would keep moving in a straight line until something interfered

3. B) Sir Isaac Newton built on Galileo’s work and discovered the laws of motions

4. C) First Law of Motion The Law of Inertia

5. 1) An object at rest tends to stay at rest, and an object in motion tends to stay in motion in a straight line until an outside force act on it.

6. a) Example a hockey puck on ice does not move until it is hit

7. b) The hockey puck sliding across the ice keeps sliding until something hits it or friction slows it down

8. c) Inertia is the tendency of an object to resist a change in its motion

9. d) The First law of motion is often called the law of Inertia

10. D) Second Law of Motion

11. 1) Force = Mass X Acceleration

12. a) Unbalanced forces change the motion of objects

13. i) an unbalanced force is force without an equal force in the opposite direction

14. ii) when an unbalanced force acts on an object , it changes the velocity of the object

15. iii) Acceleration is the rate of change in velocity

16. 2) the greater the force, the greater the acceleration

17. 3) the greater the mass, the smaller is the acceleration

18. D) the change in velocity will happen in the direction the force is applied

19. 1) the force will put the object into motion in the direction of the push

20. 2) an unbalanced force in the opposite direction will cause the object to slow down or stop

21. VIII) Third Law of Motion

22. A) For every action force, there is an equal and opposite reaction force

23. 1) a hand pushing on a desk (action force) produces an equal but opposite reaction force of the desk pushing on the hand