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motion & force
vocabulary
Term | Definition |
---|---|
motion | an object change in position relative to a reference point . |
reference point | a moving object can be used for reference point |
speed | the distance traveled divided by the time interval during which the motion occurred . |
velocity | the speed of an object in a particular direction . |
acceleration | the rate at which velocity changes over time an object accelerates if it speed direction or both change . |
force | a push or a pull exerted on an object force has size and direction |
newton | the SI untie for force |
net force | the combination of all of the force acting on an object |
balanced force | when the force on an object produce a net force of 0 N the force are balanced . |
unbalanced forces | when the net force on an object is 0 N the force on the object are unbalanced . |
energy | ability to do work |
potential energy | energy stored stored within an object |
kinetic energy | energy of motion batteries & food |
how do you know a thing is moving ? | by looking at the force of the object |