The Time Required for a Dropped Object to Hit the Ground

question 51

Multiple Choice

The time required for a dropped object to hit the ground is given by $t \equiv \sqrt { \frac { 2 h } { g } }$ , where h is the vertical distance traveled and g is the acceleration due to gravity, assumed to be 32.2 feet per second squared. How tall a building is required for an object to take 9 seconds to fall to the ground?

• A) h = 2,409.1 feet
• B) h = 1,142.8 feet
• C) h = 1,304.1 feet
• D) h = 2,035.1 feet
• E) h = 3,865.4 feet

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