University Physics - chapters 2 and 4
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Created by:
aliciafeliz on September 24, 2010
Subjects:
science, physics, general physics, vectors, laws of motion, force
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12 terms
Terms | Definitions |
|---|---|
 vector | a quantity having both magnitude and direction |
| scalar | a quantity that has magnitude only |
| resultant | the vector sum of two or more vectors |
| direction angle | angle corresponding tot he direction of a vector, usually referenced to the positive horizontal, usually symbol is θ, with a subscript for the vector |
| components of a vector | the horizontal and vertical projections of a vector |
| force | a push or a pull |
| net force | the vector sum or resultant of two or more forces acting on an object |
| first law of motion | an object will not experience a change in velocity unless acted upon by an external force. "Rest" is a special case of v = 0 when the external net force is zero |
| inertial reference frame | an object or place defined as being at rest |
| static equilibrium | the condition in which an object is at rest because the net force on it is zero |
| second law of motion | for objects moving at non-consistent velocity, the acceleration equals the net force divided by the mass or a = ∑F/m |
| weight | gravitational force on an object, when acceleration is g; F = ma becomes w = mg |
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