force and motion Flashcards
(29 cards)
the state in which one object’s distance from another is changing
motion
a place or object used for comparison to determine if an object is in motion
reference point
a system of measurement based on multiples of ten and on established measures of mass, length and time
International System of Units (SI)
basic SI unit of length
meter
one of the the major pieces that makes up earth’s upper layer
plate
the rate at which velocity changes
acceleration
the distance an object travels in one unit of time
speed
speed in a given direction
velocity
the overall force on an object when all individual forces are added together
net force
a push or pull exerted on an object
force
a nonzero net force which changes an object’s motion
unbalanced forces
equal forces acting on an object in opposite directions
balanced forces
the tendency of an object to resist any change in its motion
inertia
the amount of matter in an object
mass
a unit of measure that equals the force required to accelerate one kilogram of mass at one meter per second
Newton
the force that one surface exerts on another when the two rub against each other
friction
friction that occurs when one solid surface slides over another
sliding friction
friction that occurs when an object rolls over a surface
rolling friction
friction that occurs when an object goes through fluid
fluid friction
the force that pulls objects towards each other
gravity
the motion of a falling object when the only force acting on it is gravity
freefall
an object that is thrown
projectile
the fluid friction experienced by objects falling through the air
air resistance
the maximum velocity a falling object can achieve
terminal velocity
