Term
| What is the push or pull that causes a change in motion? |
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Definition
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Term
| What is the object a force is acting upon? |
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Definition
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Term
| What causes an acceleration which is a change in velocity? |
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Definition
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Term
| What causes an acceleration which is a change in velocity? |
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Definition
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Term
| Why does an object in motion change direction, speed up, slow down, or stop? |
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Definition
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Term
| What can a change in speed and/or direction of an object cause? |
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Definition
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Term
| Can an object have velocity without a force acting on it? |
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Definition
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Term
| What exists when an object from the external world touches a system and thereby exerts a force on it? |
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Definition
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Term
| What kind of forces are exerted without contact? |
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Definition
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Term
| What do forces result from? |
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Definition
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Term
| What is the identifiable cause of the force (what is exerting the force)? |
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Definition
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Term
| Can gravity act horizontally? |
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Definition
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Term
| What is force measured in? |
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Definition
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Term
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Definition
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Term
| What is the vector sum of all the forces in an object? |
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Definition
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Term
| What is acceleration of an object that is proportional to the net force acting on it and inversely proportional to the mass of the object being accelerated? |
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Definition
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Term
| What is the equation for Newton's 2nd Law? |
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Definition
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Term
| What will a stationary object with no net force acting on it do? |
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Definition
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Term
| In the ideal case of zero resistance, what should happen to horizontal motion? |
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Definition
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Term
| What is an object that is at rest will remain at rest and an object that is in motion will continue to move in a straight line with constant speed? |
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Definition
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Term
| What are the five types of force? |
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Definition
| friction, normal force, tension, thrust force, and weight |
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Term
| What kind of force is a contact force that acts to oppose sliding motion between surfaces (a "retarding force- acts parallel to the surface and opposite direction of sliding)? |
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Definition
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Term
| What kind of force is a contact force exerted by a surface on an object- acts perpendicular to and away from the surface? |
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Definition
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Term
| What kind of force is a pull exereted by a string, rope, or cable when attached to a body and pulled taut, acts away from the object and parallel to the string, rope, or cable at the point of attachment? |
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Definition
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Term
| What kind of force is one that moves objects like rockets, planes, cars, and people, acts in the same direction as the acceleration of the object, barring any resistive forces? |
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Definition
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Term
| What kind of force is a field force due to gravitational attraction between two objects, generally the Earth and an object, acts straight down toward the center of Earth? |
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Definition
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Term
| What is another name for Newton's First Law? |
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Definition
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Term
| What is the tendency of an object to resist change? |
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Definition
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Term
| Since velocity includes both speed and direction of motion, what is required to change either the speed or direction? |
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Definition
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Term
| What is the net force on an object when it's zero? |
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Definition
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Term
| What kind of force do scales exert when someone stands on them? |
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Definition
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Term
| What is the force an object experiences as a result of all the forces acting on it, giving the object an acceleration? |
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Definition
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Term
| no contact forces are pushing up on the object and the object's apparent weight is zero (not zero actual weight) |
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Definition
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Term
| What is force exerted by a fluid on the object moving through the fluid (note- air is a type of fluid)? |
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Definition
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Term
| What causes the magnitude of the drag force to increase? |
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Definition
| the speed of the air increases |
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Term
| What is the constant velocity reached when the drag force equals the force of gravity? |
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Definition
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Term
| no net force results in what? |
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Definition
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Term
| What are greatly affected by a drag force and quickly reach terminal velocity? |
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Definition
| light objects with large surface area |
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Term
| What are two forces that are in opposite directions and have equal magnitude (action- reaction pair of forces- exist together or not at all)? |
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Definition
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Term
| All forces come in pairs. The force on one object is equal in magnitude and opposite in direction the other. |
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Definition
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Term
| What occurs on a moving object, force exerted on one surface by another when the two surfaces rub against each other because on e or both are moving? |
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Definition
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Term
| What kind of friction is a force exerted on one surface by another when there is no motion between the two surfaces? |
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Definition
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Term
| What relates frictional to normal force? |
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Definition
| coefficient of kinetic friction |
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Term
| What is the maximum static friction that must be overcome before motion begins? |
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Definition
| coefficient of static friction |
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