What measurement unit is commonly used for acceleration in relation to gravity?

Acceleration in relation to gravity is typically expressed in units of G-force, which is a measure of acceleration relative to the acceleration due to Earth's gravity. One G is equivalent to an acceleration of approximately 9.81 meters per second squared (m/s²), which is the standard acceleration due to gravity at the Earth's surface. This unit provides a way to describe how forces, such as those experienced during rapid acceleration or deceleration, relate to the familiar force of gravity.

The other units listed do not specifically measure acceleration in relation to gravity. The Newton is a unit of force, the Joule measures energy, and the Pascal is a unit of pressure. While these units are essential in physics, they do not directly represent acceleration as G-force does. Thus, G-force is the most appropriate choice when discussing acceleration relative to gravity.