When You Drop a Pebble from Height H, It Reaches

question 99

Multiple Choice

When you drop a pebble from height H, it reaches the ground with speed V if there is no air resistance. From what height should you drop it so it will reach the ground with twice speed?

• A) 2H
• B) 8H
• C) 5H
• D) 16H
• E) 4H

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