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7th Motion & Forces
Term | Definition |
---|---|
force | push or pull on matter that enables that matter to CHANGE motion and interact; transfer and transform energy |
net force | the sum of all the forces acting on an object |
unbalanced forces | change the motion of an object; net force ≠0 |
balanced forces | do not change the motion of an object; net force =0 |
acceleration | ANY change in motion; can be in direction or speed |
magnitude | the quantity or amount |
Newton’s First Law/Law of Inertia | objects will remain at rest OR in constant motion UNLESS acted on by an unbalanced force |
linear motion | the motion of an object traveling in a straight line |
direction | the path of movement |
speed | the distance an object travels divided by the time it takes to travel that distance |
displacement | the object's overall change in position, from a starting point to an ending point |
constant speed | when an object does not increase or decrease its speed |
average speed | calculated by dividing the total distance traveled by the total time of travel; s = d/t |
velocity | Speed + direction |