A roller-coaster car starts from rest at a point above the ground

PHYSICS · Single correct · GCSE · Physics · Energy · Energy

Problem

A roller-coaster car starts from rest at a point

20\,\text{m}

above the ground. Neglecting friction, calculate its speed when it reaches a point

5\,\text{m}

above the ground. Take

g = 10\,\text{m/s}^2

. (a)

14\,\text{m/s}

(b)

20\,\text{m/s}

(c)

17\,\text{m/s}

(d)

10\,\text{m/s}