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20 Cards in this Set
- Front
- Back
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air resistance
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th eopposing force created by objects moving through air
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equilibrium
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when forces in an object are balanced
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force
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a push, a pull, or any action that has the ability to change motion
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friction
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the force that results from relative motion between objects
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gravity
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the attractive force that exists between any two objects that have mass
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inertia
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the reluctance of a body to change its state of motion
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law of conservation of momentum
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as long as interacting objects are not influenced by outside forces, their momentum before the interaction will equal their momentum before the interaction
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mass
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a measure of the inertia of an object; the amount of matter in an object
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momentum
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mass times velocity
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net force
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the amount of force that overcomes another force to cause motion
-force can be 0 if they are equal |
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newton
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unit of force
N |
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Newton's 1st Law of Motion
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an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an outside force
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Newton's 2nd Law
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acceleration of an object is proportional to the force acting on it and inversely proportional to its mass
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Newton's 3rd Law
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every action has an equal and opposite re-action
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pounds
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English system's unit of force
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sliding friction
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resistance created when two surfaces rub against each other
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weight
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a force created by gravity
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difference between mass and weight
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mass never changes
weight does |
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rolling friction
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resistance created when one object rolls over another
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viscous friction
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resistance created by objects moving in water or other fluid
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