Science Vocab Flashcards
acceleration
the rate at which velocity changes
action-reaction pairs
two forces, acting on different bodies, having equal strength but opposite direction
air resistance
the force of air against a moving object; also called drag
average speed
the total distance an object travels divided by the total time it takes to travel the distance
balanced forces
forces, acting on the same body, equal in size but opposite in direction
constant speed
no change in speed
drag
air resistance- the force of air against a moving object
force
a push or pull one body exerts against another
friction
a force that opposes motion between two surfaces that are touching each other
gravity
the mutual force of attraction that exists between all objects in the universe, force Earth exerts on all objects on or near it
intertia
the property of a body that resists any change in velocity
kinetic energy
energy of motion
mass
the amount of matter in an object’ the measure of the inertia of a body
matter
anything that has mass and takes up space
motion
change in position
negative acceleration
the rate of decrease in velocity
net force
force that results from unbalanced forces acting on an object; changes the motion of an object
newton
the unit of force; force required to accelerate a 1-kg mass at the rate of 1 m/s/s
physicists
scientists who study the structure and interaction of matter as well as the changes in position that matter undergoes
potential energy
the energy of objects due to their position or condition
spring scale
a device used to measure force
unbalanced forces
forces acting on the same body, unequal in size and/or opposite in direction
velocity
the speed and direction of a moving object
