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Forces & Motion

Forces and Momentum Vocabulary

TermDefinition
Force a push or a pull on object that may change the motion of the object
Balanced Force Forces are equal on all sides; DOES equal zero Newtons; an object's motion WILL NOT CHANGE
Unbalanced Force Forces are not equal; Does NOT equal zero Newtons; an object's motion WILL CHANGE
Net Force the overall force on an object ;
Newtons the units used for force (N)
Mass the amount of matter in an object
Gravity a force that pulls all objects that mass toward one another
Friction a force that resists motion when two surfaces are touching
Motion any change in the location of an object
Isaac Newton the scientist credited with the three laws of motion
Newton's 1st Law An object at rest will remain at rest and an object in motion will remain in motion; until acted upon by an outside force
Newton's 2nd Law The force of an object is equal to its mass multiplied by its acceleration
Newton's 3rd Law For every action there is an equal and opposite reaction
Inertia an object's tendency to resist a change in motion
Speed the distance an object travels
Average Speed the total distance an object travels divided by the total time traveled
Momentum Mass of an object in motion
Formula for Force Force=mass X acceleration
Formula for Momentum Momentum= mass X velocity
Formula for Work Work=force X distance
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