Newton and His Three Laws

Front

What is a force?

Back

A force is a push or pull that can change the motion of an object.

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Front

What are the three laws of motion proposed by Newton?

Back

1. First Law: An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force. 2. Second Law: The acceleration of an object depends on the mass of the object and the amount of force applied. 3. Third Law: For every action, there is an equal and opposite reaction.

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Front

What does the First Law of Motion state?

Back

The First Law of Motion states that an object will remain at rest or in uniform motion unless acted upon by a net external force.

Front

Why do we wear seatbelts in cars?

Back

We wear seatbelts because of the First Law of Motion; they help to keep us in our seats when the car stops suddenly.

Front

What is an example of the First Law of Motion?

Back

A picture hanging on a wall that does not move is an example of the First Law of Motion.

Front

What does the Second Law of Motion explain?

Back

The Second Law of Motion explains that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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Front

Why is it easier to push a child on a swing than an adult?

Back

It is easier to push a child on a swing than an adult because of the Second Law of Motion; the child has less mass.

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Front

What is an example of the Second Law of Motion?

Back

Pushing a child on a swing is an example of the Second Law of Motion.

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Front

What does the Third Law of Motion state?

Back

The Third Law of Motion states that for every action, there is an equal and opposite reaction.

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Front

Can you give an example of the Third Law of Motion?

Back

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

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