Final answer:
The measured value of acceleration due to gravity near Earth's surface is 9.8 m/s², which is option c.
Step-by-step explanation:
The question concerns the acceleration due to gravity near the surface of the Earth. The measured value of acceleration due to gravity, which is the acceleration of an object when it is subjected only to the force of gravity and not impeded by any other forces, is 9.8 m/s². So the correct answer to the question is c. 9.8 m/s².
It is important to note that while this value can vary slightly depending on geographical location, altitude, and other factors, the standard average value used for most calculations is 9.8 m/s². This value is crucial for solving problems related to falling objects and projectile motion in Physics.