Acceleration  - The change in an object's velocity over time, measured in distance per unit time per unit time (for example meters per second per second or m/s2)., Newton - A metric (or SI) unit measuring force and named for English physicist Isaac Newton., Net Force - The sum of all forces acting on a particle or body., Velocity - The speed of something in a given direction., Displacement - How far out of place an object is, Distance - How far an object has traveled., Gravity - The natural force that attracts a body toward another body that has mass., Speed - How fast an object moves, measured in m/s., Inertia - An object retains its state of rest or its velocity so long as it is not acted upon by an external force., Mass - The amount of matter that an object contains., Motion - Changing place or position, Time - The system of those sequential relations that any event has to any other, as past, present, or future.,

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