Opposition to a change in motion

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Your new ahaInertia

Inertia is the tendency to maintain a state of rest or steady straight-line motion. Source: Inertia ↗

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09Equal and opposite forcesRECALL
Newton's third law
Action and reaction act on different objects
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10Rate of change of velocityRECALL
Acceleration
Measured in metres per second squared
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11Energy stored in a stretched springRECALL
Elastic potential energy
Depends on stiffness and extension
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