<p>I put II and III for einstein postulates. I put I and II for known before, but I could easily be wrong. </p>
<p>What did people put for which arrow is slowest speed of ball off building hitting the ground. I put C (horizontal arrow)</p>
<p>I put II and III for einstein postulates. I put I and II for known before, but I could easily be wrong. </p>
<p>What did people put for which arrow is slowest speed of ball off building hitting the ground. I put C (horizontal arrow)</p>