Newton's Three Laws of Motion

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What are Newton's Three Laws of Motion?

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1. First Law: An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force. 2. Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma). 3. Third Law: For every action, there is an equal and opposite reaction.

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Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to the mass of the object.

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What does Newton's First Law of Motion state?

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An object at rest will remain at rest, and an object in motion will continue moving at a constant velocity unless acted upon by an unbalanced force.

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What is an example of Newton's First Law of Motion?

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A book resting on a table will remain at rest until someone pushes it.

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What does Newton's Second Law of Motion describe?

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It describes the relationship between force, mass, and acceleration, stating that F=ma.

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Front

What is an example of Newton's Second Law of Motion?

Back

Pushing a shopping cart: the harder you push (more force), the faster it accelerates.

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NGSS.MS-PS2-2

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What does Newton's Third Law of Motion state?

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For every action, there is an equal and opposite reaction.

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NGSS.MS-PS2-1

Front

What is an example of Newton's Third Law of Motion?

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When you jump off a small boat, you push the boat backward as you move forward.

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NGSS.MS-PS2-1

Front

What is the significance of action and reaction force pairs?

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They occur whether there is motion or not, illustrating that forces always come in pairs.

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Front

How does mass affect inertia?

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The greater the mass of an object, the greater its inertia, meaning it will resist changes in motion more.