Term
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Definition
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Term
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Definition
| forces that arise from physical contact between two objects (ex. throwing a basketball or pulling a water skier) |
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Term
| noncontact forces/action-at-a-distance forces |
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Definition
| forces that objects exert on one another even though they are not touching |
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Term
| Is mass a scalar or vector quantity? |
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Definition
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Term
| Newton's first law of motion |
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Definition
| an object continues in a state of rest or in a state of motion at a constant velocity unless compelled to change that state by a net force |
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Term
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Definition
| the vector sum of all forces acting simultaneously on a body |
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Term
| What is the purpose served when a net force acts on an object? |
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Definition
| to change the object's velocity, not to sustain it |
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Term
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Definition
| the natural tendency of an object to remain at rest or in motion at a constant velocity |
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Term
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Definition
| a quantitative measure of inertia |
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Term
| SI unit of inertia & mass |
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Definition
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Term
| How are mass and inertia correlated? |
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Definition
| the larger the mass, the greater the inertia |
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Term
| Can "mass" and "weight" be used interchangeably? |
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Definition
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Term
| Are accelerating reference frames inertial or noninertial? |
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Definition
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Term
| inertial reference frames |
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Definition
| one in which Newton's first law of inertia is valid |
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Term
| Newton's second law of motion |
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Definition
| when a net external force "sigma vector F" acts on an object of mass "m", the acceleration "vector a" that results is directly proportional to the net force & had a magnitude that is inversely proportional to the mass; the direction of the acceleration is the same as the direction of the net force; "vector a" = "sigma vector F"/"m"; "sigma vector F" = "m"("vector a") |
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Term
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Definition
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Term
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Definition
| forces that the environment exerts on the object of interest |
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Term
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Definition
| forces that one part of an object exerts on another part of the object |
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Term
| Is the newton a derived or base SI unit? |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| a diagram that represents the object & the forces that act on it |
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Term
| Only the forces that _____ appear in a free-body diagram |
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Definition
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Term
| Newton's third law of motion/the "action-reaction" law |
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Definition
| whenever one object exerts a force on a second object, the second object exerts an oppositely directed force of equal magnitude on the first object; for every action there is an equal, but opposite, reaction |
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Term
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Definition
1. gravitational force
2. strong nuclear force
3. electroweak force |
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Term
| Newton's Law of Universal Gravitation |
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Definition
| every particle in the universe exerts an attractive force on every other particle; F = G(m1m2/r^2) |
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Term
| What does "G" (universal gravitational constant) equal in Newton's Law of Universal Gravitation? |
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Definition
| 6.674 x 10^-11 N m^2/kg^2 |
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Term
| What does "r" mean in Newton's Law of Universal Gravitation? |
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Definition
| the distance between the center of masses of the objects/particles |
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Term
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Definition
| the gravitational force that the earth exerts on an object |
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Term
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Definition
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Term
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Definition
| W = G(ME x m)/r^2 OR W = m(g) |
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Term
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Definition
| the component of the force that a surface exerts on an object with which it is in contact that is perpendicular to the surface |
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Term
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Definition
| if an object is resting on a horizontal surface & there are no vertically acting forces except the object's weight & the normal force |
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Term
| Does the normal force always have the same magnitude of the weight of an object? |
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Definition
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Term
| When does the apparent weight not equal the true weight? |
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Definition
| if the scale and the person on it are accelerating |
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Term
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Definition
| the force that an object exerts on a scale with which it is in contact |
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Term
| equation for apparent weight |
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Definition
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Term
| frictional force (friction) |
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Definition
| the component of the force that is parallel to the surface when the object moves or attempts to move along a surface |
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Term
| maximum static frictional force (vector fsMAX) |
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Definition
| the force just before breakaway |
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Term
| equation for kinetic frictional force |
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Definition
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Term
| What is the main difference between static friction & kinetic friction? |
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Definition
static: opposes the impending relative motion between two objects
kinetic: opposes the relative sliding motion that actually does occur |
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Term
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Definition
| when an object has zero acceleration |
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