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When You Drop a Pebble from Height H, It Reaches 2H\sqrt { 2 H }

Question 139

Multiple Choice

When you drop a pebble from height H, it reaches the ground with kinetic energy K if there is no air resistance. From what height should you drop it so it will reach the ground with twice as much
Kinetic energy?


A) 4H
B) 8H
C) 2H\sqrt { 2 H }
D) 16H
E) 2H

Correct Answer:

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