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educated quess using what you know and what you observe
hypothesis

amount of space occupied by an object
volume

push or pull that one body exerts on another
force

force that opposes motion between two touching surfaces
friction

states that any two masses exert an attractive force on eachother, the amount of which depends on the mass of the two objects and the distance between them
law of gravitation

organized procedure for testing a hypothesis that tests the effect of one thing on another under controlled conditions
experiment

distance an object travels per unit of time
speed

sum of the forces that are acting on an object
net force

acceleration of an object toward the center of a curved or circular path
centripetal acceleration

speed of an object at a given point in time, different depending on when it is measured
instantaneous speed

factor that can cause a change in the result of an experiment
variable

speed of an object and the direction it travels
velocity

forces on a body that are equal in size and oppostie in direction and do not change the motion of the body
balanced force

a force directed toward the center of the circle for an object moving in circular motion
centripetal force

property that a moving object has because of its mass and velocity
momentum

in an experiment, a variable that does not change when other variables change
constant

rate of change of velocity, which occurs if an object speeds up, changes direction, or slows down
acceleration

resistance of an object to a change in its motion
inertia

gravitational force exerted on an object by earth
weight

total distance that an object travels divided by the total time it takes to travel that distance
average speed

formula to convert celsius to kelvin
c + 273

formula to convert kelvin to celsius
k  273

formula to find momentum (p)
p= mv

formula to find velocity
v= p/m

formula to convert L to mL
L x 1,000

formula to convert mL to L
mL / 1,000

formula to find speed
s= d/t

formula to find acceleration


an object moving at a constant velocity keeps moving at that velocity until a net force acts on it
newton's first law of motion

the net force acting on an object causes the object to accelerate in the direction of the net force
newton's second law of motion

when one object exerts a force on a second object, the second one exerts a force on the first that is equal in size and opposite in direction (to every action force there is an equal and oppostie reaction force)
newton's third law of motion

