Here's why:
* Weight is the force of gravity acting on an object's mass.
* Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.
* When the person stands on the floor, they exert a downward force (their weight) on the floor.
* The floor, in turn, exerts an equal and opposite upward force on the person, preventing them from falling through the floor.
Therefore, the force exerted on the person is their weight, 150 pounds.
