How tall is the tree rock brushes against uppermost leaves
To measure the height of a tree, you throw a rock directly upward, with a speed just fast enough that the rock brushes against the uppermost leaves and then falls back to the ground. If the rock is in the air for 2.3 s, how tall is the tree?
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The rock brushes against the uppermost leaves and then falls back to the ground. If the rock is in the air for 2.3 s, how tall is the tree?
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