A pebble is released from rest from a bridge and falls for before hitting the water below

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A pebble is released from rest from a bridge and falls for

3\,\text{s}

before hitting the water below. Take

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

. What is its speed just before it touches the water? (a)

19.6\,\text{m/s}

(b)

44.1\,\text{m/s}

(c)

29.4\,\text{m/s}

(d)

14.7\,\text{m/s}