Question
Asked Feb 5, 2019

A boy throws a rock horizontally with a velocity of 8.0 m/s from a bridge. It falls 19.0 m to the water below. What is the magnitude of the velocity of the rock just before it hits the water?

check_circleExpert Solution
Step 1

If vx is the initial horizontal velocity, g is the acceleration due to gravity, the time taken for the rock to reach water is t, distance is d, then,

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Step 2

Vertical component of velocity vy is,

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Step 3

Velocity v of the rock just before...

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Kinematics

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