Front

Gravity (중력 / 重力)

Back

The invisible pulling force between two objects.

Front

Speed (속도 / 速度)

Back

The rate at which an object moves, which can be affected by forces like air resistance.

Front

Vacuum (진공 / 真空)

Back

An empty space with no air or other matter.

Front

Orbital Speed (궤도 속도 / 轨道速度)

Back

The speed at which an object moves along its circular or oval path around another object (like a planet around the Sun).

Front

Inertia (관성 / 惯性)

Back

The tendency of a moving object to keep moving in a straight line.

Front

Speed (속도 / 速度)

Back

The rate at which an object changes its position, indicating how fast it is moving.

Front

Mass (질량 / 质量)

Back

The amount of matter in an object, which affects how much it resists changes in motion.

Front

Force (힘 / 力)

Back

A push or pull that can change the motion of an object.

Front

Friction (마찰 / 摩擦)

Back

The resistance that one surface or object encounters when moving over another.