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24 Cards in this Set
- Front
- Back
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Speed (+formula)
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Speed is the rate of change in position
S=D/T |
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Instantaneous Speed (+ex.)
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rate of motion at any given instant
ex. speedometer in a car |
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constant speed (+ex.)
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A speed that doesn't change.
ex. A car driving on the highway (doesn't stop keeps moving) |
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Average Speed (+Ex.)
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Total distance traveled divided by the total time of travel.
Ex. 5-km is average distance 1/4 hour is average speed |
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X axis is...
y Axis is... |
Time
Distance |
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Velocity (formula)
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The rate of motion in direction and speed.
V=d/t |
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A (moving) object can have the same ________ but different ________
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speed
velocities |
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Acceleration (formula)
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the rate of change in velocity; change in the speed or direction
A= Vf-Vi/t |
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3 Ways to accelerate
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increase speed
decrease speed change direction |
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Force (ex.)
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A push or pull one body exerts on another
ex. Pushing, pulling, stretching, squeezing, bending and falling. |
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Balanced Force (ex.)
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when a force doesn't cause a change in velocity.
ex. a tug of war game with your dog |
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Net force (ex.)
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when a force causes a change in velocity
ex. kick a ball, when a dog pulls you |
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Inertia
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the tendency of an object to resist any change in its motion.
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Inertia is directly related to an objects ______
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Mass
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More mass; the more ______ needed to start/stop it.
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force
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sir Isaac Newtons 1st Law of Motion
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an object moving at a constant velocity will keep moving unless a net force acts on it. If it's at rest, it will stay at rest until a net force acts upon it.
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Friction (+ex.)
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the force that opposses motion between to surfaces that are touching eachother.
ex.Lube |
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friction depends on...
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1, The kinds of surfaces
2. the amount of force pressing it together. |
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GRavity
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the attracting force exerted by every object on every other object.
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Gravitational force depends on ...
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1. The obectss mass
2. their distance apart |
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Weight (ex.)
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the measure of the force of gravity on an object
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Weight is related to....
And depends on... |
mass
location (further away from earth the less gravitational pull there is) |
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When weight changes...
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Mass DOES NOT change
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Weight is measured in
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NEwtons
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