Question

A roller coaster moves 85m horizontally, then travels 45m at an angle of 30 degrees above the horizontal. What is its displacement form its strting point? Use graphical techniques.

Answer 1

I am not sure about the distance is from the starting point.
So , let me consider that the whole distance is from the starting point.
The displacement is the relative distance from the starting point.
It will then be\[85+45\cos(30)=123.97metres\]