Newton's laws of motion

The Three Newton’s laws of motion


Newton’s Laws of Motion that affect the state of motion

Going broad on motion after explaining some terms about it. knowing some laws governing its principles will help to give more clarification on the motion. Sir Isaac Newton, who was an astronomer, physicist and English mathematician. He gave three laws which are proved to be fundamental laws when explaining the motion of a body. Today I will be discussing broadly on Newton’s laws of motion. The historian gave three good laws named “Newton’s laws of motion”. He explained in these three laws that the relationship between forces acting on a body and the motion of the body. The following stated below are Newton’s three laws. They are:

  1. An object continues to be under the state of uniform motion unless an external force act on it.
  2. Force is a product of mass and acceleration.
  3. For every action, there is an equal and opposite reaction.

Newton’s First Law of Motion

The newton’s first law of motion states that “A body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force will act on it”. This is a law of inertia, i.e. suppose a block is kept on the floor, this box will remain at rest. This box will change in position only if some external force is applied to it. The first law of Newton is known as the law of inertia.

Newton’s second law of motion

If you notice, the first law has explained a qualitative definition of force. Newton’s second law will be explaining magnitude. It states that the net force exposed to a body is directly proportional to the rate of change of momentum of the body. It is written as:

Formula for newton's laws


Where k is the constant of proportionality and it comes out to be 1 when the values are taken in SI unit. Hence the final expression will be,

F = ma

Problem solved on Newton’s second law of motion

Suppose a body of mass 10kg is having an acceleration of 5m/s2. What is the net force experienced by it?


From the second law of motion, we know,

F = ma

Putting the values, we get:

F = (10 x 5) N

F = 50N

Therefore, the body is experiencing a net force of 50N.

Third Newton’s law of motion:

Newton’s third law of motion states that for every action, there is an equal and opposite reaction. This is to say, forces are always found in pairs. This three law can be called a state of motion.

The three newton's laws of motion

I hope you’ve found this post interesting and attained the knowledge. If so, you can freely give your point in our comment section and please share with other students. Thanks!


Leave a Reply

Your email address will not be published. Required fields are marked *