A coin of mass is dropped from rest from a height of

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

Problem

A coin of mass

0.1\,\text{kg}

is dropped from rest from a height of

25\,\text{m}

. At a certain instant, its gravitational potential energy has decreased by

15\,\text{J}

. Neglecting air resistance, what is the speed of the coin at that instant? (Take

g = 9.8\,\text{m/s}^2

.) (a)

15.0\,\text{m/s}

(b)

22.1\,\text{m/s}

(c)

17.3\,\text{m/s}

(d)

12.0\,\text{m/s}

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