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Chapter 1 & 2 Forces & Motion
8th |
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| When an object's distance from another object is changing |
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| Speed equals distance divided by |
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| The rate at which velocity changes is called |
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| Jupiter accelerates because it is |
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| Continuously changing direction |
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| If you know a car traveled 300 kilometers in 3 hours you can find its |
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| When 2 forces act in the same direction |
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| The tendency of an object to resist change in its motion is known as |
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| The force that one surface exerts on another when the 2 rub against each other is known as |
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| The law of universal gravitation states that any 2 objects in the universe, without exception |
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| According to the law of conservation of momentum, when 2 objects collide in the absence of friction |
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| The total momentum stays the same |
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| In physical science, a push or pull is called |
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| An example of increasing friction intentionally is |
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| Throwing sand on an icy driveway |
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| A leaf flutters instead of dropping straight to the ground when it falls from a tree because it experiences |
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| According to Newton's third Law of Motion, when a hammer strikes and exerts force on a nail, the nail |
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| Exerts an equal force back on the hammer |
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| If a toy car traveling at 10cm/s passes a toy car moving at 10cm/s in the opposite direction, both cars have the same |
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| The SI unit of ACCELERATION is |
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| The property of matter that resists a change in motion is called |
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| According to Newton's second law of motion, force equals mass times |
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| Force required to accelerate 1kg of mass at 1 meter per second per second |
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| A person traveling in a car that stops suddenly keeps moving forward due to |
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| The downward force acting on an object in free fall is the force of |
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| The amount of matter in an object is called its |
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| According to Newton's 3rd law of motion, the strength of a reaction force is |
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| EQUAL TO the strength of the action force |
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| The momentum of an object is in the same DIRECTION as |
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| Friction acts in a direction |
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| OPPOSITE to an object's direction of motion |
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| Air resistance is a type of |
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Increase speed or
Decrease speed or
Change direction |
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