Question

A girl weighing 25 kg stands on the floor . She exerts a downward force of 25 Newton. What force does the floor exert on her

Answer 1

According to Newton's Third Law
Every action has equal and opposite reaction.

So, from the above statement we can say that
Thrust (or force) exerted by girl = Normal reaction (or force exerted by floor).
Therefore,
Floor exerts a force of 25N on the girl.

Thanks.

Answer 2

Hlo!

according to the 3rd law of motion,that is every action and reaction is equal and opposite.

So the girl exerts 25N of force on floor and the force exerted by the floor is equal to the force exerted by the girl.

So the force exerted by the floor is 25N.

I hope this is helpful to you!