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# ps unit 1

### newtons first law,inertia,and motion

TermDefinition
Distance how far you have travelled between two positions. it is always posititive 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 position minus initial position. it can be positive or negative. it is a vector quanity
scalar quanity that only requires magnitude (how big)
vector quantity that requiers both magnitude (how big) and directions
speed how fast something is moving. it is equal to distance divided by time. it is a scalar quantity
velocity how fast something is moving. it is equal to distance divided by time, it is a vector
newton's first law AKA the law of inertia. an object that is at rest and will stay at rest and an object in motion with the same speed and in the same direction unless acted upon by an unbalanced force
mass a measure of the amount of matter an objects contains. also a measure of the amount an inertia an object has.
inertia the resistance an object has to change its motion
force any push or pull (intraction) that can cause a change in motion an interaction between two object
net force the combination of all forces on an object
balanced force when the net force in both horizontal or vertical directions is 0 N these cause motion stay unchanged
unbalanced force when the net force is both horizontal or vertical directions 0 N these cause the motion to change
gravitational force A non-contact force between two objects that is most apparent close to a large object, such as a planet, The direction of the force is general towards the center of the other object. Eg. Towards the center of the earth.
applied force
Created by: FaZeharambe