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5th Force & Motion

Force and Motion

TermDefinition
force any push or pull that acts on an object
motion change in position over time
frame of reference a group of objects from which you can measure a position or motion
speed how fast an object’s position changes over time
velocity the measurement that combines both the speed and the direction of a moving object
Newton unit that is used to measure force
spring scale an instrument that measures force
contact force a force that requires two pieces of matter to touch
non-contact force a force that acts at a distance
friction a force that results when two materials rub against each other.
gravity the force of attraction between any two objects
balanced forces forces that act together on an object without changing its motion
unbalanced forces forces that do not cancel each other out and cause an object to change its motion
air resistance the force of air slowing an object down
acceleration a change in velocity over time
potential energy stored energy
kinetic energy energy of a moving object
 



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