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# Newton%92s first law

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Newton 1st Law

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### Newton%92s first law

1. 1. Newton’s First Law (law of inertia)
2. 2. Newton’s First Law (law of inertia) An object at rest willcontinue to stay at restunless an outside force acts on it and …
3. 3. Newton’s First Law (law of inertia)an object in motion will continue to stay inmotion at constant speed in a straight line unless an outside force acts on it
4. 4. Newton’s First Law (law of inertia)FORCE is a push or apull applied to an objectthat will cause it to startmoving, stop moving or change its speed or direction
5. 5. Newton’s First Law (law of inertia)FRICTION is the forcethat acts in the oppositedirection of the motion of the object
6. 6. Newton’s First Law (law of inertia)MASS is the measure of theamount of matter in an object measured in grams (g) or kilograms (kg)
7. 7. Newton’s First Law (law of inertia)WEIGHT is a measure of theforce of gravity on the mass of an objectmeasured in Newtons (N)
8. 8. Newton’s First Law (law of inertia)
9. 9. Newton’s First Law (law of inertia) INERTIA is a property of an object that describes how hard it is to change the motion of the objectmore mass means more inertia
10. 10. REVIEW QUESTIONS1. What is the difference between mass and weight?3. Which has more mass, 12 g of feathers or 12 g of lead?5. When an astronaut is living on the International Space Station, what happens to his mass?
11. 11. REVIEW QUESTIONS1. What would the mass of a dog be if it has a weight of 100N?3. What would the weight of an apple be if it has a mass of 1.5 kg?5. What is a force?
12. 12. REVIEW QUESTIONS1. What is friction?3. What causes friction on a moving object?