Inertia - The tendency of an object to resist changes in its motion; an object at rest stays at rest, and an object in motion continues in motion unless acted upon by an unbalanced force., Balanced Force - Forces that are equal in size but opposite in direction; they cancel out and do not change an object’s motion., Unbalanced Force - Forces that are not equal; they cause an object to start moving, stop, or change direction., Force - A push or pull that can cause an object to move or change its motion., Motion - The change in position of an object over time., Rest - When an object is not moving; it has no motion., Constant Speed - Motion where the object moves the same distance in the same amount of time; speed does not change., Direction - The line or path along which something moves., Friction - A force that opposes motion between two surfaces that are in contact., Net Force - The combination of all forces acting on an object; determines whether an object’s motion changes., Newton's 1st Law of Motion - Inertia,

Newton’s First Law / Forces and Motion (TEKS 7.7D)

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