Key words semester 1

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9 Terms

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Force

Something that causes acceleration

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weight

force of gravity on a mass

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Normal force

the contact force exerted by a surface on an object, acting perpendicularly to the surface

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Friction

A force that resists the relative motion between two surfaces in contact, opposing the direction of motion

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Coefficient of static force

the ratio between the maximum frictional force of stationary object and the normal force

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Coefficient of kinetic friction

the ratio between the frictional force on a moving object and the normal force

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Tension

A rection force exerted by a stretched string

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Keplers 3rd Law

The orbital period of a planet square is proportional to the orbital radius cubed 

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Newtons Law of Gravity

The gravitational force of attraction between two masses is proportional to the product of the masses and inversely proportional to the square of the distance between them