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C3 Science Vocab

Vocabulary for Science Chapter 3

motion a change in the position of an object
relative motion the change in one object’s position compared with another object’s position
reference point a place or object used to determine if an object is moving
velocity a measure of how fast an object moves and the direction it is moving
acceleration a change in the speed or direction that an object moves
speed a measure of how fast an on object moves
Speed = Distance/Time
thrust a force that pushes or pulls an airplane forward
friction a force that acts when two surfaces rub together
drag a force caused by the air as the plane moves through it
force any push or pull
gravity is the force that pulls all objects toward each other
lift a pushing force from below that keeps an airplane in the air
balanced force two forces acting in opposite directions and the object does not move
contact force must touch an object to affect it
non-contact force these forces can affect objects without touching them
combined forces forces that can cause a balance or unbalanced force
Created by: rklein