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18 Cards in this Set
- Front
- Back
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A quantity that does not have direction associated with it, only magnitude. Ex: speed, mass |
Scalar |
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A physical quantity that has direction and magnitude associated with it |
Vector |
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Change in velocity/change in time (m/s) |
Average acceleration |
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Given by the slope of the tangent to a position against time graph |
Instantaneous velocity |
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Given by the slope of the tangent to a velocity against time graph |
Instantaneous acceleration |
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Tendency of a body to maintain its state of motion |
Inertia |
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Measure of the amount of matter in a body = quantitative measure of body's inertial properties |
Mass |
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Force exerted on an object by earth's gravitational pull (Has magnitude and direction) (N) |
Weight |
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V^2/r |
Centripetal acceleration |
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mv^2/r |
Centripetal force |
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F =G(m1m2/r^2) |
Newton's Law of Universal Gravitation- inverse square law |
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If velocity is constant acceleration is what? |
Equals zero |
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Do net or resultant forces cause accelerated motion? |
Yes |
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Newtons first law |
An object at rest stays at rest. An object in motion says in motion, in a straight line at a constant speed, unless an outside force acts upon it. |
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Newtons second law |
The acceleration of an object is directly proportional to the magnitude of the net force. Acceleration is in the same direction as the net force. And acceleration is inversely proportional to the mass of an object. |
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Newton's third law |
For every action there is an equal and opposite reaction. |
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F=ma |
Newton's second law |
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If the distance between two masses is doubled, by what factor does the gravitational force change? |
1/4 as strong Decreases with the inverse square of the distance |
