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# Newton%92s first law

## on May 03, 2012

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Newton 1st Law

Newton 1st Law

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## Newton%92s first lawPresentation Transcript

• Newton’s First Law (law of inertia)
• Newton’s First Law (law of inertia) An object at rest willcontinue to stay at restunless an outside force acts on it and …
• 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
• 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
• Newton’s First Law (law of inertia)FRICTION is the forcethat acts in the oppositedirection of the motion of the object
• 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)
• 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)
• Newton’s First Law (law of inertia)
• 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
• 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?
• 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?
• REVIEW QUESTIONS1. What is friction?3. What causes friction on a moving object?