You are absolutely correct! When you stand on the floor, the floor exerts an upward force against your feet. This is known as the normal force.

Here's why:

* Newton's Third Law: Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. When you stand on the floor, your weight (due to gravity) pushes down on the floor. The floor, in response, pushes back on you with an equal and opposite force.

* Equilibrium: The reason you don't move downwards despite the force of gravity is that the upward normal force from the floor perfectly balances your weight. You are in a state of equilibrium, where the net force acting on you is zero.

How much is this force?

The normal force is equal to your weight. To calculate your weight, you can use the formula:

Weight = Mass × Acceleration due to Gravity

For example, if your mass is 60 kg, your weight would be:

Weight = 60 kg × 9.8 m/s² = 588 Newtons

This means the floor is pushing back on you with a force of 588 Newtons.