Question

write the definition of normal force ​

Answer 1

Answer:

The normal force is the force that surfaces exert to prevent solid objects from passing through each other. Normal force is a contact force. If two surfaces are not in contact, they can't exert a normal force on each other.

Answer 2

Answer:

The normal force is the force that surfaces exert to prevent solid objects from passing through each other. ... If two surfaces are not in contact, they can't exert a normal force on each other. For example, the surfaces of a table and a box cannot exert normal forces on each other if they are not in contact.