Term
| Forces come in two forms. A force can be a _____ or a _____ |
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| Isaac Newton is responsible for creating ____ laws of motion. |
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Definition
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The _____ law of motion states that:
Every object at rest willl remain at _________ unless acted on by a _________.
Likewise, every object in ________ will remain in motion (in a straight line) unless a ____________ |
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Definition
The first law of motion states that:
Every object at rest willl remain at rest unless acted on by a force.
Likewise, every object in motion will remain in motion (in a straight line) unless a force acts on it. |
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Term
| _________ is the force that is pulling everything down toward the center of earth. |
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| When you're holding an object, it doesn't fall. A balanced force is being applied to the object to oppose gravity. What is the name of the force you're applying with your hand? |
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Term
| Sitting in a chair, stops you from falling (due to gravity). Your support force is ________to the force of gravity pulling you down. This is proved because you are not falling. |
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Definition
| Sitting in a chair, stops you from falling (due to gravity). Your support force is the chair to the force of gravity pulling you down. This is proved because you are not falling. |
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Term
What law of motion states that:
A greater unbalanced external force is required to accelerate an object with more mass. |
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Definition
| Newtons 2nd law of Motion |
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Term
| What happened when you pushed a wooden ball and a steel ball across your desk at the same time? |
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Definition
| THe wooden ball went faster. |
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Term
| Which ball has more mass: wooden or steel |
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Definition
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Term
| If you want the steel ball to move as far as the wooden ball did, what do you have to do? |
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Definition
| Apply more pressure to the steel ball. |
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Term
| Weight is a _________ of the ______________ pulling on an object. |
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Definition
| Weight is a measure of the amount of gravity pulling on an object. |
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Term
| What is the amount of matter in an object? |
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Definition
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Term
An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
This law is often called "the law of inertia". |
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Definition
| Newtons 1st law of Motion |
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Term
| Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). |
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Definition
| Newtons 2nd law of Motion |
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Term
| For every action there is an equal and opposite re-action. |
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Definition
| Newtons 3rd law of Motion |
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Term
The force that opposes gravity
ex: The walls must be strong enough to hold up the roof of a house.
A pothole is caused when there is NOT enough of this. |
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Definition
| Gravitational support force |
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Term
A push or a pull (Don't forget: gravity pulls!) |
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Definition
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Term
Is speed in a particular direction.
o A moving object that changes speed but moves in the same direction
o A moving object that changes direction but keeps the same speed |
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Definition
| Newton's 3rd law of Motion |
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Term
Measure of the amount of matter in an object. We use a balance to measure this! |
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Measure of how much a planet, such as Earth is pulling on you. We use a scale to
measure this. |
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| Rate of change in speed and direction. |
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Term
| While the ball is in the air, one force acting on it is gravity. Gravity pulls the ball down to the earth without touching it. This means it is an example of a _______ force, or a force exerted on an object that does not make contact with it. |
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Term
| There is another forces acting on the ball while it is in the air. While the ball travels to your friend, it is experiencing air resistance. You have experienced air resistance before: while sticking your hand out of the window of the car or riding your bike into the wind. Air resistance is an example of a ______ force. |
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