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Newton's Laws
Term | Definition |
---|---|
Newton's 1st Law | an object at rest will remain at rest, and an object moving at a constant velocity, unless acted opon by an unbalanced force. |
Newton's 2nd Law | the greater the mass, the greater the inertia |
force = | mass x acceleration |
acceleration = | net force / mass |
measured in | Newtons (N) |
Newton's 3rd Law | for every action, there is an equal and opposite reaction |
gravity | a force that pulls objects toward each other |
if you increase the force on an object, its acceleration | decreases |
if you increase the mass on an object, its acceleration | stays the same |
a resistance to a change in motion is | inertia |
the amount of inertia an object has depends on its | mass |
inertia | the tendancy of an object to resist a change in motion |
speed = | distance / time |
steeper slope = | faster acceleration |
gravity = | 1. mass 2. distance |
what is the name given to the force exerted by the first object on a second object? | reaction force |
what is the name often given to the force exerted by the second object back on the first object? | action force |
the action and reaction forces in any situation will always be | equal and opposite |
the product of an object's mass and veloctiy is its | momentum |
momentum = | mass x velocity |
the unit of measurment for momentum | kg x m/s |
law of conservation of momentum | in the absence of outside forces, the total momentum of objects that interact does not change. |
another name for Newton's 1st Law | the law of inertia |
what forces cause an object to accelerate | unbalanced forces |
acceleration depends on | force and mass |
reactions always go in the ... direction of the action | opposite |
an action and its reaction are equal in | size |
Newton's 3rd Law explains what happens when two objects | interact |
forces always come in pairs so each ... has a reaction | action |
the force of an action sends a reaction in the opposite | direction |