Question

Which Newton’s law of motion defines force?
A. First
B. Second
C. Third
D. None

Answer 1

Hint: There are three types of newton’s law of motion. Newton’s laws of motion describes the relationship between a body and force acting upon the body. There are two types of nature of forces present i.e. balanced forces and unbalanced forces. When an object is in equilibrium, the net force acting on it is balanced and when the body is not in equilibrium means moving with changing speed, then the force is unbalanced.

Complete answer:
Newton’s first law of motion defines the states of the body when there is no force present. This law states that if the body is moving with a constant velocity or resting in position then it will remain in that position until the external force is not applied. This law is also known as the law of inertia.

Newton’s second law of motion defines the force acting upon the body. This law states that force is equal to the rate of change of momentum. The force on a body is equal to the product of mass of the body and the acceleration of the body produced by the force. Mathematically this law is represented as follows:$F = \dfrac{{dp}}{{dt}} = m\dfrac{{dv}}{{dt}} = ma$.

Newton’s third law states that when two objects interact, they apply forces to one another known as action forces that are equal in magnitude and opposite in direction called reaction force. This law is also called the law of action and reaction.

Newton's second law defines the force.

So, the correct answer is “Option B”.

Note:
Newton’s laws of motion is given by an English physicist and mathematician Sir Isaac Newton. His laws of motion explains the relationship between the forces applied upon the body and the motion of the body.