A roller coaster with a mass of $300$ kg is at the top of a $75\mathrm{.}0$ m hill. It rolls down the hill on very low friction wheels and climbs up to the top of a $45\mathrm{.}0$ m hill. Find:

$($a$)$ the speed of the thing at the bottom of the first hill

$($b$)$ its speed at the top of the second hill.

Answer rating: 100% (QA)

Given Data Mass of the roller coaster m 300 kg Height of the first hill h1 750 m Height of the secon... View the full answer