What is the approximate value of acceleration due to gravity on Earth's surface?

The acceleration due to gravity on Earth's surface is commonly accepted as approximately 9.8 m/s². This value represents how quickly an object accelerates towards Earth when it is in free fall, assuming no air resistance. The unit m/s² signifies that for every second an object falls, its velocity increases by approximately 9.8 meters per second due to the pull of Earth's gravity.

This value is fundamental in physics as it provides a basis for calculations involving motion under the influence of gravity. It is often rounded to 10 m/s² for simplicity in some introductory physics problems, but the more precise value is 9.8 m/s². Thus, B is accurately reflecting the standard measured value of gravitational acceleration, making it the correct choice.