Question
In Example 7.7, we found that the speed of a roller coaster that had descended 20.0 m was only slightly greater when it had an initial speed of 5.00 m/s than when it started from rest. This implies that $\Delta PE > KE_i$ . Confirm this statement by taking the ratio of $\Delta PE$ to $KE_i$. (Note that mass cancels.)

$15.6$

Solution Video