Do I need to know...... for Physics?

<p>Hey guys</p>

<pre><code> I am now using the sparknotes and PR cracking for phy SAT , but the 2 books are slightly different........
</code></pre>

<p>do I need to know Moment of Inertia??which sparknotes covers while PR doesn't</p>

<p>thanks... :)</p>

<p>anyone?plz?</p>

<p>:)</p>