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## Homework Statement

A 4.0X10 to the power of 4 kg roller coaster starts from rest at point A. Neglecting friction, calculate the potential energy relative to the ground, its kinetic energy, and its speed at points B, C and D.

Height A=54m

Height B=15m

Height C=47m

Height D=35m

## Homework Equations

Eg=mg triangle (height)- Triangle=multiply height

Ek=1/2mv square

## The Attempt at a Solution

I found the answer for the total potential energy from A to D which is 5.9X10 to the power of 7 J. I got height, mass, and total potential energy.

I need help finding the kinetic energy and the speed for points B, C, and D with a step by step solution.