6th grade Force and Motion
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| When an object changes position in relation to a reference point | Motion
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| The object which stays in place in relation to an object that is moving | Reference Point
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| The rate at which an object moves; | Speed
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| The speed of an objection in a particular direction | Velocity
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| The rate at which velocity (speed/direction) changes. | Acceleration
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| Acceleration that occurs in a circular motion | Centripetal Acceleration or Centripetal Force
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| A push or pull; | Force
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| an (SI) unit of measurement used by scientists to express force | Newton
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| The force that results from combining all of the forces exerted on an object | Net Force
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| When the net force of an object is not zero | Unbalanced Force
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| When the forces applied to an object produce a net force of zero | Balanced Force
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| Happens when a force causes an object to move in the direction of the force | Work
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| A force that opposes motion between two surfaces that are touching | Friction
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| The force of attraction between all objects that is due to their masses | Gravity
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| The measure of gravitational forces exerted on an object | Weight
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| The tendency of all objects to resist any change in motion | Inertia
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| The characteristic of a moving body that is caused by its mass and its motion | Momentum
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| Speed = | distance/time
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| Velocity involves both speed and _________ | Direction
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| Acceleration is any change in ____________ | Velocity (speed or direction)
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| A force is a ________ and __________. | Push and pull
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| Two forces that affects motion are ______ and _________ | Gravity and friction
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| The force that keeps you in a roller coaster during a looop is called ________________ | Centripital Force
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| Combining all of the forces acting on an object gives you _______ ________. | Net Force
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| If forces are working in the same direction, you ______ them | Add.
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| If forces are working in opposite directions, you ______ them. | Subtract
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| A net force of zero means that an object is ____________ | Balanced.
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| A net for of 5N left means that an object is ___________. | Un balanced.
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| It always takes a ________ force to move an object or stop it from moving. |
Unbalanced.
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| Friction is an _________ force because objects are working against each other. | Unbalanced.
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| Putting oil or water on a surface would _______ friction. | Reduce.
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| PUtting sandpaper on a surface would _______ friction. | Increase.
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| Friction changes the _________ of an object. | Motion
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| Gravity is a force of ________ because objects are pulling toward each other. | Attraction
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| All objects in the universe attract each other through gravitational force. The size of the force depends on the ________ of the object and the ________ between them. | Mass and Distance.
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| The more mass something has the _________ gravitational pull it has. | More.
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| The closer objects are, the, _________ gravitational force they have. | More.
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| When objects are further distance apart, their gravitational force ________ | Lessens.
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| Which does NOT change based on gravity? Mass or weight? | Mass.
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| 1 Law - Inertia - an object at rest will stay at ________. | Rest
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| An object in motion will stay in _______, unless an ________ force acts upon it. | Motion and Unbalanced
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| 2nd LQV^/ - Acceleration - an object's acceleration depends on it's mass and the amount of force exerted on it. As mass increases, acceleration ________________. | Decreases
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| 3rd Law Action/Reaction - whenever one object exerts a force on another object, the second object exerts an _______ and ________ force on the first object. | Equal and opposite.
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| Machines make work and motion easier because they change the ___________ and/or the amount of the force | Direction
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| Name the six simple machines | Lever, pulley, inclined plane (ramp), wedge, wheel and axle, screw.
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| Name the three parts of the lever. | Fulcrum, load (resistance), force.
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| Ona lst class lever, the ______ is in the middle. | Fulcrum.
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| Moving the fulcrum closer to the load/resistance | Decreases the effort.
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| On a 2nd class lever, the _ _____ is in the middle. | Load
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| On a 3rd class lever, the _______ is in the middle | Effort
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| Fixed/Simple pulleys only change the ______ of the force. | Direction
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| Moveable pulleys change the _ ______ of the force | Amount.
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| When a machine reduces the effort, it is called a mechanical __________. | Adventage
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