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24 Cards in this Set
- Front
- Back
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What is velocity?
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The speed of an oblect in a certain direction.
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What is Momentum?
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The product (multiplacation) of the mass of an object and its velocity.
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What is speed?
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the rate in change of position
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What is balenced?
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forces on an object that are equal in size an opposite direction.
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What is weight?
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the measure of force of gravity exerted on an oject
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What is interia?
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the tendancy of an oblect to resist ....
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What is friction?
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The force that oposes motion between two surfaces that are touching each other
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What is acceleration?
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the rate of change in velocity
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What is force?
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any push or pull on an oblect
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what is gravity?
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the force of attraction between all objects in the universe
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What is the point of referance?
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The point at which an object begins to change position
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What is a balenced force?
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forces on an object that are equal in size, an opposite in direction.
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What is Unbalenced force?
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Forces that change the velocity of an object
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Average Speed
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the best way to describe speed if motion varies a great deal in an object
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Describe the relationship between mass and momentum
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the more mass, the more momentum
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Decribe the relationship between velocity and momentum?
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the more velocity, the higher the momentum
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Can a change in force cause a change in velocity?
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Yes
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What is the only time an object is not accelerating?
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when both its speed and direction are constant
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Do cars on an interstate going in opposite directions have the same velocity?
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No
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What two things must change in order for velocity to change?
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Speed, Direction
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Describe the relationship between gravitational pull and mass.
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as mass increases, gravitational pull increases
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Why is it that an objects weight can change but its mass cant?
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because the amount of space taken up cant ever change
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What two things determain the acceleration of an object?
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size of the force, the mass of an object.
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Describe the relationship between mass and interia
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As mass increases interia increases
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