8th Grade Newton's Laws

Terms in this set (15)

Newton's first law

An object in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force.

Newton's second law

the acceleration of an object depends on the mass of the object and the amount of force applied

Newton's third law

For every action, there is an equal and opposite reaction

a push or a pull

the combination of all forces acting on an object

unbalanced force

a force that causes an object to start or stop moving or to change direction (accelerate)

forces that are equal and acting on an object in opposite directions

the force that two surfaces exert when they rub against each other

a force that pulls objects towards each other

an object experiences this when gravity is the only force acting on it

a type of fluid friction that objects falling through air experience

terminal velocity

the greatest velocity an falling object can reach; when the force of air resistance equals the weight of the object

tendency of an object to resist a change in motion; "stubbornness"

mass in motion; a quantity of motion that depends on mass and velocity

law of conservation of momentum

the total momentum of objects that interact stays the same in the absence of outside forces

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