Term
| When is an object in motion |
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Definition
| When it's position is changing relative to a reference point |
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Definition
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Definition
| A force that pulls objects together |
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Definition
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| What causes a change in an object's motion? |
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Definition
| An unbalanced force acting on the object. |
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Term
| What causes a thrown object to change its motion? |
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Definition
| The force of gravity that pull the object towards the earth. |
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Term
| Newton's 1st Law of Motion |
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Definition
| An object at rest remains at rest and an object in motion remains in motion until an unbalanced force acts on it. |
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Term
| Newton's 2nd Law of Motion |
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Definition
The force of an object is equal to its mass times acceleration F = MA |
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Term
Newton's 3rd Law of Motion |
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Definition
Forces act in pairs, equal in size, but opposite in directions. |
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Term
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Definition
Stored energy Examples: battery, top of hill/roller coaster |
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Definition
The energy of motion Examples: rolling down the hill/roller coaster, throwing a ball |
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Term
What happens to an object's mass when it goes to the moon? Why? |
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Definition
| Nothing, the object is made of same amount of matter |
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Term
| What happens to an object's weight when it goes to the moon? Why? |
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Definition
| The object weighs less than on earth. Because the moon is smaller and has a smaller force of gravity. |
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Term
| What is the name of a force that causes an object’s motion to slow down because of the rubbing of 2 surfaces? |
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Definition
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Term
| What is acceleration? What changes when something is accelerating? |
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Definition
A change in velocity. The speed or direction of an object is changing. |
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Term
What is work? What must happen for work to be done? |
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Definition
| Work happens when a force causes an object to move. The object must move for work to happen. |
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Term
| Why does an object's weight change when it goes to the moon? |
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Definition
| The moon has a much smaller mass than the earth, so it has a smaller force of gravity. Weight is a measure of gravity, less gravity means it weighs less. |
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