When a roller coaster gets to the bottom of a descent, describe the energy transfers and changes to energy stores that happen if: a) the brakes are applied to stop it
b) it goes up and over a second hill.

its B

Explanation:

It's B & A at the same time because A. a roller coaster uses brakes to slow down and stop. B is the most reasonable answer. Because all roller coasters go up and over a second time over the hill, but they also slow down. But go with B.

TELL ME IF I´M RITE

ill do it for 100, also this isnt 80 its 40

0.11 m/s and 0.28 m/s should be correct