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19 Cards in this Set
- Front
- Back
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What is inertia?
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The tendency of an object to remain it its present state of motion.
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What is mass?
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The quantitative measure of an object's inertia.
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What is gravitational force?
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mass times gravity
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What is electomagnetic force?
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atoms creating bonds. Also includes contact force.
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What is true about contact forces?
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The are usually perpendicular to a surface or parallel to a surface.
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What is Newton's First Law?
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The law of inertia. An object in rest stays at rest and an object in motion stays in motion.
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What is Newton's Second Law?
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The objects state of motion will be inversely proportional to mass of an object and directly proportional to the net force acting on the object.
F=ma |
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What is Newton's Third Law?
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For every action, there is an equal and opposite reaction.
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What is Newton's Law of Universal gravitation?
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That every mass in the universe exerts an attractive force on every other mass in the universe. This force is proportion to both masses m1 and m2 and inversely proportional to the square distance between them.
F=Gm1m2/rsquared G=6.67x10^-11 |
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In order to use Newton's second law what must you use?
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net force
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The net force (normal force and gravity) of an inclined plane is always equal to what?
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mgsintheta
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On an inclined plane what is mgcostheta equal to?
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normal force
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At 90 degress and 0 degress what is the acceleration?
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Some fraction of gravity.
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What is friction?
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It is caused by the attractive molecular forces between contiguous surfaces/
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What is static friction? Fs?
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Is the force of opposing motion when to contiguous surfaces are not moving relative to each other.
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What is kenetic friction?
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Is the force resisting motion once the two contiguous surfaces are sliding relative to each other.
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What does fs equal?
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Fs<usFn
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What does fk equal?
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fk=ukFn
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What is tension?
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Tension is the force acting through a flexible object with no mass, such as a string or rope.
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