Question

A roller coaster has 658J of energy at the bottom of a loop. How much energy does the roller coaster have at the top of the loop, assuming no friction

Answer 1

The energy of the roller coaster at the bottom of the loop is given as

E = 658 J.

This is the kinetic energy of the roller coaster.

Due to this kinetic energy, the roller coaster starts moving upwards.

With the increasing height of the roller coaster, potential energy increases and kinetic energy decreases.

Thus, at the top of the loop, the roller coaster has only potential energy.

According to the conservation of energy,

Thus, the answer is 658 J.