forces
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| newtons 1st law of motion | an object at rest stays at rest and and object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalenced force
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| newtons 2nd law of motion | the acceleration of an object as produced by a net force is directly propotional to the magnitude of the net force, in the same directon as the net force,and inversely prportional to the mass of the object
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| newtons 3rd law of motion | for every action there is an equal and opposite reaction
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| friction | force that opposes moion between two touching surfaces
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| static friction | the friction betwen two sufaces that are not moving past eachother
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| sliding friction | the force that oppposes the motion of two surfaces sliding past eachother
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| rolling friction | the friction beten a rollig object and the surface it rolls on is rolling friction
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| air resistnce | force of air resistance is opposite direction to the force of gravity
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| terminal velocity | highest velocity that a falling object will reach
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| gravity | force that attracts things to another
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| the law of universal gravity | any two masses exert an attractive force on eachother
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| weight | the gravitational force exerted on an object
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| projectile motion | anything thats thrown or shot through the air
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| centripeal acceleration | acceleration toward the center of a curved or circular path
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| centripeal force | an unballnced force
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| momentum | the productofits mass and velocity
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| law of conservation of momentum | if a group f objects exerts force only on eachother their total momentum doesnt change
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