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# Chapter 14, Lesson 2

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### Chapter 14, Lesson 2

1. 1. mass<br />acceleration/force<br />acceleration/mass<br />balanced forces<br />unbalanced forces<br />momentum<br />action<br />reaction<br />work<br />simple machines<br />lever<br />fulcrum<br />effort arm<br />resistance arm<br />pulley<br />wheel and axle<br />ramp<br />inclined plane<br />wedge <br />screw<br />Chapter 14, Lesson 2Newton’s Second and Third Laws of Motion<br />
2. 2. mass – A measure of the amount of matter in an object. The mass of an object is related to the force required to accelerate it.<br />
3. 3. acceleration/force – the more force you apply, the greater the acceleration<br />Click on the picture for some great questions about acceleration and force!<br />
4. 4. acceleration/mass – the greater the mass, the more force necessary to get an object to accelerate<br />Click on the picture!<br />
5. 5. balanced forces – when all the forces on an object cancel each other out, you have balanced forces – no acceleration, no momentum<br />Click on the picture for some great questions about balanced and unbalanced forces.<br />
6. 6. unbalanced forces – when forces don’t cancel each other out, there is movement. This is a result of unbalanced forces. <br />Click on the picture for some information about unbalanced forces.<br />Click on the picture for some information about kinds of forces.<br />
7. 7. momentum – momentum measures how difficult it will be to stop an object<br />Click on the picture for some information about momentum.<br />
8. 8. Newton’s First Law of Motion – “An object at rest tends to stay at rest; an object in motion tends to stay in motion.”<br />
9. 9. velocity – the speed of a moving object taken together with its direction of travel<br />
10. 10. acceleration – a change in velocity<br />
11. 11. acceleration – a change in velocity<br />
12. 12. deceleration – when a force causes the speed of an object to decrease<br />
13. 13. incline – a ramp/slope <br />
14. 14. pendulum – something hanging from a fixed point that swings due to gravity and then out due to inertia <br />Click on the picture below to check out a link on pendulums<br />
15. 15. gravity – something hanging from a fixed point that swings due to gravity and then out due to inertia <br />Click on the picture below to check out a link on gravity.<br />