object B moves
An object, in itself, does not have any force. It can exert a force on another object, such as gravitational or electro-magnetic attraction or repulsion, or from impact. However, in all such cases, you require two (or more) objects: one object, in isolation, exerts no force.
Yes, when the object is submerged in water then water exerts opposite buoyonci force which decrease the weight of object.
Mass is the amount of matter in an object. It does not change based on gravity. Weight is the force an object exerts 'downward' due to gravitational acceleration. Force = (mass)*(acceleration). Acceleration due to gravity is less on the Moon than on Earth.
Object B must be circumscribed about object A.
.Object B must be inscribed in object A.
When object A exerts a force on object B, object B exerts the same force on object A, but in the opposite direction. That means, if you hit a wall with a force of, let's say 50 N, the wall will hit you back with the same force. If you stand on the floor and exert a force of 1000 N, the floor exerts the same force on you, so there is no resultant force, and that is why you stand on it.
Gravitational force exerts an attraction on objects.
When something exerts a force on an object, that object exerts an equal and opposite force on the other object.
When one object exerts a force on another object, the second object the same size force on the first object.
The object that exerts gravity is an object with mass.
Of exactly the same magnitude but in the opposite direction.
It means that if one object exerts a force on another object, the other objects exerts a force back on the first object.
That law basically states that if an object "A" exerts a force on another object "B", then the object "B" will also exert a force back on object "A". Each force is the negative of the other, i.e., they have the same magnitude but act in opposite directions.
Gravitational Force
buoyancy is the upward force that water exerts on an object. :)
Newton's laws all have to do with forces. The first says that if the net force on an object is zero, the object will experience no acceleration (its velocity will remain constant). The second says that the force on an object is equal to the rate of change of the object's momentum, or more commonly the object's mass times its acceleration. The third law describes action-reaction pairs, where any time an object A exerts a force on an object B, object B exerts a force of the same magnitude on object A.
Newton's third law states that if an object "A" exerts a force on object "B", then object "B" will exert the same force (but in the opposite direction), on object "A". This applies to gravitation, as well as other forces.