Name the physical quantity whose unit is Newton.

Hint: The physical quantity is the property of the material or the system that can be represented as the measurement. A physical quantity can be represented as the combination of the numerical value and the unit. For every term which is used in physics there will be a unit.

Complete step by step answer
The force is the vector quantity and the vector quantity is the quantity which has both the magnitude and the direction. If the force is acting on the object, to describe the force fully, we must define the magnitude and the direction. For example, if we describe the force as $x\,N$, is not the full description of the force. The correct form to describe the force is $x\,N$ which acts in downwards or upwards is the correct form to describe the force.
Sir Issac Newton is the man who first invented the force and gives the three laws about the force. Newton's first law of the motion tells that the object is in rest or in uniform motion unless the external force will act upon the object is in rest or in uniform motion. Newton's second law of the motion tells that the force is directly proportional to the mass and the acceleration of the object. Newton's third law states that for every action there is an equal and the opposite reaction.

Thus, the force is the physical quantity whose unit is the Newtons.

Note The force of the object is directly proportional to the mass of the object and the acceleration of the object. As the mass of the object and the acceleration of the object increases, then the force of the object is also increasing. As the mass of the object and the acceleration of the object is decreasing, then the force of the object is also decreasing.