Question

what is normal force on the object ?

Answer 1

In a simple case such as an objectresting upon a table, the normal forceon the object is equal but in opposite direction to the gravitational forceapplied on the object (or the weight of the object), that is, , where m is mass, and g is the gravitational field strength (about 9.81 m/s2 on Earth).

Answer 2

Normal is the force applied on the object by the surface , it is perpendicularly away from the surface contact