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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
What is one's Frame of Reference
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The background or point (assumed to be stationary) used for comparison when motion is described
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What's your point?
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Motion
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a change in position in a certain amount of time.
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The four steps to problem solving
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1.) Write the formula
2.) Plug in the numbers 3.) Show the math 4.) Display the answer (circle it!) |
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Speed
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The rate at which an object moves.
Speed = Distance / Time s = d/t |
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Velocity
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Speed in a given direction.
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Acceleration
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The rate of change in velocity
Acceleration = (Final Vel. - Initial Vel.) / time A = (v[f] - v[0])/t |
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Momentum
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depends upon the mass of the object and the velocity with which it is traveling
Momentum = mass × velocity |
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Force
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a push or a pull. Gives energy to an object, sometimes casuing it to start moving or change direction.
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Combining Forces: Unbalanced Forces
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- change the motion of an object
- if standing still, then start moving | + → = → - if moving, then slow down/stop, or speed up → + → = →→ |
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Combining Forces: Balanced Forces
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No change in motion
→ + ← = | |
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Friction
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A force that opposes motion.
- exists when two surfaces touch - exists because objects and their surfaces are not perfectly smooth. - Causes moving objects to slow down. |
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Three types of friction
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sliding
rolling fluid |
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Amount of friction depends upon
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How hard the objects are pushed together by
- the mass of the objects. - gravitational and other forces - surface materials - type of friction produced |
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mass
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The amount of matter in an object.
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Newton's first law of motion
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An object will resist changes in motion.
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Newton's Second Law
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For a given force:
F = Mass * Acceleration For a given mass: - The larger the mass, the smaller the acceleration, - The smaller the the mass, the larger the acceleration |
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Newton's Third Law
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For every action, there is an equal and opposite reaction
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Action Force
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The initial (starting) push or pull
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Reaction Force
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That force that pushes or pulls back in response to the action force
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Weight
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The pull of gravity on an object.
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