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39 Cards in this Set
- Front
- Back
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position |
describes the location of an object |
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reference point |
a location to which you compare other locations |
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vector |
an arrow that has direction and magnitude; a quantity that has both size and direction |
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motion |
a change in position over time |
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speed |
measure of how far something moves in a given amount of time |
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average speed = distance/ time |
equation for speed |
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velocity |
a speed in a specific direction ie: 55 mph NW |
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acceleration |
the rate at which velocity changes |
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average acceleration |
(final velocity-starting velocity) /time |
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centripetal acceleration |
acceleration in a circular motion
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force |
simply a push or a pull |
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net force |
the combination of all the forces acting on an object |
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inertia |
the tendency of all objects to resist a change in motion |
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Newton's first law of motion |
an object at rest stays at rest and an object in motion stays in motion at the same speed and direction, unless it experiences an unbalanced force |
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Newton's second law of motion |
The acceleration of an object depends on the mass of the object and the amount of force applied. |
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Force = mass x acceleration |
equation for force |
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Newton's Trd Law of Motion |
Whenever one objects exerts a force on a object, the second object exerts an equal and opposite force on the first |
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gravity |
a force of attraction between objects due to their mass |
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F= mass x gravity Earth's gravity factor = 9.8 m/s/s |
The equation for the force of gravity on an object on Earth |
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unit of measure for velocity |
m/s with a direction (N, S, E, W) |
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unit of measure for acceleration |
m/s/s or meters per second squared |
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unit of measure for speed |
m/s or km/h |
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unit of measure for time |
s or seconds or hours or minutes |
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unit of measure of distance |
meters or km or m |
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the object that exerts the greatest gravitational force |
the largest object will have the greatest gravitational pull on an object |
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positive acceleration |
increasing speed |
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negative acceleration |
decreasing speed |
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changing acceleration |
involves changing direction or changing speed
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When acceleration and velocity are in the same direction |
The speed will increase |
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When acceleration and velocity are in opposing directions |
the speed will decrease |
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Objects traveling circular motion |
Experience centripetal acceleration |
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An airplane leaves NY to fly to LA. It travels 3850 km in 5.5 hours. What is it's speed? |
700 km/hr |
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On a speed graph, the steeper the line |
the faster the speed |
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How are speed and velocity related |
Velocity has speed with a direction |
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atmospheric pressure |
the pressure caused by the weight of the atmosphere |
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The acceleration due to gravity is the same for all falling objects when there is not air resistance. |
TRUE |
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orbit |
when an object travels around another object in space |
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balanced forces |
forces do not change objects movement or non-movement |
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unbalanced forces |
causes a change in an objects movement or non-movement |
