Math Problem Statement
You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 9.00 s after it was thrown. What is the speed of the rock just before it reaches the water 21.0 m below the point where the rock left your hand? Ignore air resistance.
Solution
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Math Problem Analysis
Mathematical Concepts
Kinematics
Projectile Motion
Free Fall
Formulas
v_f = v_0 - g t
v^2 = v_0^2 + 2 g h
Theorems
Kinematic Equations of Motion
Suitable Grade Level
Grades 10-12
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