Overview
Force varies with mass and rate of change of speed. It's much easier to stop a slow-moving cannonball than a rapid tennis ball.
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1 - 1Inertia January 01, 1980 -
1 - 2Mass January 01, 1970
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1 - 3Speed January 01, 1970
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1 - 4Acceleration (1) January 01, 1970
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1 - 5Acceleration (2) January 01, 1970
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1 - 6Gravity January 01, 1970
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1 - 7Weight vs. Mass January 01, 1970
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1 - 8Work January 01, 1970
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1 - 9Kinetic Energy January 01, 1970
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1 - 10Potential Energy January 01, 1970