Презентация Newtons Laws of Motion онлайн

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24 слайда
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1,2,3,4,5,6,7,8,9,10,11
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Слайды и текст к этой презентации:

№1 слайд

Содержание слайда: Newton’s Laws of Motion 3 Laws

№2 слайд

Содержание слайда: For Free Science Videos for Kids

№3 слайд

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№4 слайд

Содержание слайда: Background Sir Isaac Newton (1643-1727) an English scientist and mathematician famous for his discovery of the law of gravity also discovered the three laws of motion. He published them in his book Philosophiae Naturalis Principia Mathematica (mathematic principles of natural philosophy) in 1687. Today these 3 laws are known as Newton’s Laws of Motion and describe the motion of all objects on the scale we experience in our everyday lives.

№5 слайд

Содержание слайда: “If I have ever made any valuable discoveries, it has been owing more to patient attention, than to any other talent.” - Sir Isaac Newton

№6 слайд

Содержание слайда: Newton’s Laws of Motion 1. An object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced force. 2. Force equals mass times acceleration (F = ma). 3. For every action there is an equal and opposite reaction.

№7 слайд

Содержание слайда: Newton’s First Law An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force.

№8 слайд

Содержание слайда: What does this mean? Basically, an object will “keep doing what it was doing” unless acted on by an unbalanced force. If the object was sitting still, it will remain stationary. If it was moving at a constant velocity, it will keep moving. It takes force to change the motion of an object.

№9 слайд

Содержание слайда: What is meant by unbalanced force?

№10 слайд

Содержание слайда: Some Examples from Real Life Two teams are playing tug of war. They are both exerting equal force on the rope in opposite directions. This balanced force results in no change of motion.

№11 слайд

Содержание слайда: Newton’s First Law is also called the Law of Inertia Inertia: the tendency of an object to resist changes in its state of motion The First Law states that all objects have inertia. The more mass an object has, the more inertia it has (and the harder it is to change its motion).

№12 слайд

Содержание слайда: More Examples from Real Life

№13 слайд

Содержание слайда: If objects in motion tend to stay in motion, why don’t moving objects keep moving forever?

№14 слайд

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№15 слайд

Содержание слайда: Newton’s Second Law Force equals mass times acceleration. F = ma

№16 слайд

Содержание слайда: What does F = ma mean? Force is directly proportional to mass and acceleration. Imagine a ball of a certain mass moving at a certain acceleration. This ball has a certain force.

№17 слайд

Содержание слайда: More about F = ma If you double the mass, you double the force. If you double the acceleration, you double the force. What if you double the mass and the acceleration? (2m)(2a) = 4F Doubling the mass and the acceleration quadruples the force. So . . . what if you decrease the mass by half? How much force would the object have now?

№18 слайд