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Download Newton`s First Law of Motion: ( Law of Inertia)
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Transcript
Newton’s First Law of Motion: ( Law of Inertia) An object at rest will remain at rest and an object in motion will remain in motion at constant velocity unless it is acted on by a net force greater than 0N. Inertia means a resistance to a change in motion. More mass means more inertia. The more mass an object has the more it will resist speeding up, slowing down, or changing directions. In other words, the more mass an object has, the harder it is to accelerate it. Newton’s Second law of Motion ( F=ma) ( There are three precepts in the second law.) 1 A force acting on an object will cause the object to accelerate in the direction of the force: the 2acceleration being proportional to the force and 3inversely proportional to the mass of the object. Newton’s 3rd Law Every action force produces an equal, opposite, reaction force. Forces come in pairs called action~reaction pairs. The pairs are equal in force but opposite in direction. NET FORCE ( the sum of the force vectors) Net force = 0N in equilibrium Net force = 3N Left Unbalanced forces Net Force = 6N Right Net Force = 1 newton down Net Force =1N down Acceleration = F/m = 1N down/3kg = .3m/s/s down