All of the following are approximately correct (that is, are exact within 10%) for a body falling freely (from rest) near the surface of the Earth except
A) during each time interval of one second, its speed changes by 30 feet per second.
B) after three seconds, its speed is 100 feet per second.
C) after one second, the body has fallen 32 feet.
D) after two seconds, the body has fallen 64 feet.

Question

Quizplus · Accepted Answer

The acceleration due to gravity near the Earth's surface is approximately 9.8 meters per second squared, or about 32 feet per second squared. This means that for each second of free fall, the speed of the object increases by about 32 feet per second, not the distance fallen. After one second, the body would have fallen only 16 feet (using the formula distance = 1/2 * g * t^2, where g is the acceleration due to gravity and t is the time in seconds), making option C incorrect.

All of the Following Are Approximately Correct (That Is, Are