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NATURE OF FORCES
Force : Push or pullNewton: unit to measure forceNet force: combination of force Unbalance force: object start movingBalance force: object doesn`t move
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FRICTION AND GRAVITY
Friction : They rub against each otherGravity: force that pulls objects downMass: amount of matter in an objectWeight: force according to gravityAir resistance: opposite force against gravity
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NEWTON`S LAW
First Newton`s law: Any object at rest remain at rest and any object that moves will keep moving until a force act over itSecond Newton`s law: acceleration depends on the mass and the applied forceInertia : resist to a motion`s changeThird Newton`s law: If one force exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.
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PRESSURE
Pressure: relationship between force over an specific area.Pascal: unit to measure pressure
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BERNOULLI`S LAWBernoulli`s: states that the faster a fluid moves , the less pressure the fluid exerts.