A stone is dropped from the top of a high cliff

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

A stone is dropped from the top of a

40\,\text{m}

high cliff. When the stone is

20\,\text{m}

above the ground, what fraction of its original gravitational potential energy has been converted into kinetic energy? (a)

\dfrac{3}{4}

(b)

\dfrac{1}{4}

(c)

\dfrac{1}{2}

(d) All of it