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The Basics of Newtonian Mechanics - the Scientia Review

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F=ma and Inertia<br />

<strong>The</strong> fact <strong>the</strong> objects with a lot <strong>of</strong> mass also have a lot <strong>of</strong><br />

inertia can be explained with Newton's second law.<br />

In <strong>the</strong> equation F=ma, mass and acceleration are<br />

inversely proportional as long as force is constant. This<br />

means that if two<br />

objects are pushed with<br />

equal force, <strong>the</strong>n <strong>the</strong><br />

object with more mass<br />

will accelerate more and<br />

<strong>the</strong> object with less mass<br />

with accelerate less.<br />

Inversely proportional<br />

Here is a picture <strong>of</strong> Newton's second law in action. <strong>The</strong> dogs apply force on<br />

<strong>the</strong> mass and it begins to accelerate in <strong>the</strong> direction <strong>of</strong> <strong>the</strong> force.<br />

means that one quantity<br />

increases as <strong>the</strong> o<strong>the</strong>r<br />

quantity decreases. In this case, <strong>the</strong> acceleration<br />

decreases as <strong>the</strong> mass <strong>of</strong> <strong>the</strong> object increases and vice<br />

versa.<br />

13

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