Acceleration due to gravity is maximum at

• The centre of earth
• At 100 km above the earth's surface
• The surface of the earth
• Infinity

The acceleration due to gravity varies depending on your distance from the Earth's center. Here's a breakdown of the options you provided:

Understanding Gravity at Different Locations

• At the Center of the Earth: Gravity is actually zero at the very center. This is because the mass of the Earth pulls equally in all directions, canceling out the gravitational force.
• At 100 km Above the Earth's Surface: Gravity is weaker here than at the surface, but it is not at its maximum. The acceleration due to gravity decreases with altitude.
• On the Surface of the Earth: This is where gravity is at its strongest, approximately 9.81 m/s².
• At Infinity: Gravity approaches zero as you move infinitely far away from the Earth.

Final Thoughts

The maximum acceleration due to gravity occurs at the surface of the Earth, not at the center or at any altitude above it.