1. Gravitational Force (Weight): The Earth's gravitational pull acts vertically downward on your body, exerting a force equal to your weight. This force pulls you towards the Earth's center.
2. Reaction Force (Normal Force): The bed exerts an upward force that counteracts your weight. This force is equal in magnitude to your weight and acts perpendicular to the surface of the bed. It pushes you upward to balance the gravitational force and prevent you from sinking into the bed.
Since the gravitational force (weight) and the reaction force (normal force) are equal in magnitude and opposite in direction, they cancel each other out. Therefore, the resultant force acting on you while lying stationary in bed is zero. You are in a state of equilibrium, maintaining a constant position with no acceleration.