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What is a push or pull on an object that can change its motion, speed, direction, or shape?
force
What is the change of position over time?
motion
What is the measure of how long it takes to get from one place to another?
speed
What is the measure of inertia of an object; depends on the amount of matter an object contains?
mass
What is the rate of change in velocity of an object?
acceleration
What is how fast something travels on average over a certain amount of time?
average speed
What is a group of reference objects whose placement can be compared to each other to determine motion?
reference frame
What is occurs when the net force between two objects is zero and there is no change in motion?
balanced forces
What is the overall force acting on an object after all the forces have been added or subtracted?
net force
What is the force that acts between any two masses?
gravity
What is the part of the experiment that can be changed or different?
variable
What is a unit of force that will accelerate one kilogram of mass one meter per second squared?
newton
What is the product of the force of gravity acting on an object?
weight
What is speed in a particular direction?
velocity
