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# first law and motion

TermDefinition
Distance how far you travel between two postions this is always postive its an scaler quanity
Displacement change in postion
scaler quanity that only requires magnitude how big
vector quanity that requies both magnitude and how big and directions
speed how fast something is moving it is equal to distance divided by time
velocity equal to distance divided by time which postion changes it is a vector quanity
Newton first law AKA the law of interia. An object that is at rest stays at rest. An object in motion stays in motion with the same speed and in the same direction unlessactedd upon by an unbalanced force
Mass the amount of matter an object has and the amount of interia an object has
Interia The resistance an object has to change its motion
Force Any push or Pull that can cause a change in motion
Net Force the combination of all of the forces on an object.
Balanced Force When the net force in both the horizontal and vertical directions is 0 N. These cause motion to remain unchanged.
Unbalanced Force When the net force in both the horizontal and vertical directions is not 0 N. These cause motion to change.
Gravitational Force /Weight (Fg) 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 (Fa) the support force exerted upon an object that is in contact with another stable object. It is in the direction of the push or pull.
Normal Force (Fn A contact force that is exerted by a surface against an object that is pressing against the surface. It is perpendicular to the surface and present whenever atoms are being “crunched”. AKA “crunchy force”
Tension Force (Ft) Contact force exerted by a taut string, rope, or wire on an object . It is along the rope and present whenever a rope is taut.
Friction Force (Ff) Contact force exerted by a taut string, rope, or wire on an object . It is along the rope and present whenever a rope is taut
Air Resistance/Drag (Fd or Fair a special type of frictional force that acts upon objects as they travel through the air/fluid. It is in the opposite direction of the motion of the object.
Spring (Elastic) Force (Fs) A contact force exerted on an object by a spring or elastic object when it is stretched or compressed . It is along the spring in a direction that would restore the spring/elastic material to its relaxed position.
Thrust (Fthrust) A contact force that is exerted in the opposite direction of an exhaust gas being expelled
Created by: 20085