acceleration - a change in speed or direction of motion over time, force - a push, pull or twist, mass - the amount of matter that something consists of, newton - the unit of measurement of force, distance - the amount of space between two points, speed - the distance an object travels divided by the time taken, displacement - the distance an object is from its starting position, velocity - a measure of how quickly displacement changes, friction - a contact force that opposes motion, caused by objects rubbing against each other, net force - all the forces acting on an object added together, normal force - the force of the floor or ground pushing an object upwards, weight force - the force generated by gravity pulling an object downwards, inertia - the property of matter that causes it to resist changes in its state of motion or rest., stationary - not moving, still,

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