Newton's laws of motion give us the relations between the forcesacting on a body and themotion of the body. These laws are as follows: ... Newton'sSecond Law of Motion states thatforce is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration, i.e. F = m*a.

Force:
Force is a physical quantity that can change the state of motion or shape of an object. It is a push or pull acting on an object due to the interaction with another object. Force is a vector quantity, which means it has both magnitude and direction. The SI unit of force is Newton (N).

Laws of Motion:
The laws of motion are three fundamental principles that describe the relationship between the motion of an object and the forces acting upon it. These laws were formulated by Sir Isaac Newton in the late 17th century and are still widely used today to understand and analyze the motion of objects.

1. Newton's First Law of Motion (Law of Inertia):
- An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same velocity, unless acted upon by an external force.
- This law is often summarized as "an object will continue doing what it is currently doing unless acted upon by an external force."
- Inertia is the property of an object to resist changes in its state of motion.

2. Newton's Second Law of Motion:
- The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- Mathematically, the second law is represented as F = ma, where F is the net force, m is the mass of the object, and a is the acceleration produced.
- This law states that the force acting on an object is directly proportional to the rate of change of its momentum.

3. Newton's Third Law of Motion (Law of Action and Reaction):
- For every action, there is an equal and opposite reaction.
- This law states that if an object exerts a force on another object, then the second object exerts an equal and opposite force on the first object.
- The forces always occur in pairs and act on two different objects.

Summary:
- Force is a push or pull acting on an object.
- The laws of motion are three fundamental principles formulated by Sir Isaac Newton.
- Newton's First Law of Motion states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.
- Newton's Second Law of Motion relates the acceleration of an object to the net force acting on it and its mass.
- Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.