bouncing ball
... that the physics of a bouncing ball can be used to understand supernovae and gravitational slingshot manoeuvres?
... that the physics of a <b id="mwBSc"><a href="./Bouncing_ball" id="mwBSg" rel="mw:WikiLink" title="Bouncing ball">bouncing ball</a></b> <i id="mwBSk">(motion shown)</i> can be used to understand <a href="./Supernova" id="mwBSo" rel="mw:WikiLink" title="Supernova">supernovae</a> and <a href="./Gravity_assist" id="mwBSs" rel="mw:WikiLink" title="Gravity assist">gravitational slingshot manoeuvres</a>?