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# physical science1

### newtons first law, inertia, and motion

distance how far you have traveled between two positions, it is always positive, it is a scalar quantity
displacement change in position. it is the straight line distance between your starting position and ending position. it is equal to final position minus initial position. it can be positive or negative, it is a vector quantity
scalar quantity that only requires magnitude (how big)
vector quantity that requires both magnitude (how big) and directions
speed how fast something is moving. is equal to distance divided by time. it is a scalar quantity
velocity rate at which positions changes. it is equal to displacement divided by time. it is a vector quantity
newtons first law aka law of inertia. an object at rest will stay at rest and object in motion stays in motion unless acted upon by an unbalanced force
mass a measure of the amount of matter an object contains. also, a measure of the amount of inertia an object has.
inertia a resistance an object has to change in its motion
force any push or pull (interaction) that can cause a change in motion. an interaction between two objects
net force the combination of all the forces on an object
balanced force when the net force in both the horizontal and vertical directions is 0N. these cause the motion to remain unchanged
unbalanced forces when the net force in both the horizontal and vertical directions is not 0N. these cause motion to change
gravitational force/ weight Fg a non-contact force between two objects is most apparent close to large object, such as a planet, the direction of the force is general towards the center of the object. Eg, Towards the center if the earth
applied force (Fa) the support force exerted upon an object that is in contact with the another stable object. it is in the direction of the push or pull
Created by: melissak