Blog posts with the tag Sir Isaac Newton | Interested In Everything


Blog posts with the tag "Sir Isaac Newton"

These are just a few basic rules that form a basis for our understanding of physics.



To  recap, the first law states that:

  • An object at rest tends to stay at rest, and will remain at rest unless acted upon by an external force.
  • An object in motion tends to stay in motion, with same direction and speed.
  • Motion, or lack thereof, cannot change unless a force acts to change the motion.

Any change in motion involves an acceleration, which brings us to Newton’s second law:



F=ma where ‘F’ is the net external force on an object, m is the mass of an object and ‘A’ is the acceleration.

This law allows us to compare results of the same force exerted on objects of a different mass.

If you exert the same force on two objects of a different mass, you will get different accelerations, or changes in motion. For example, the effect of a 10 newton force on a golf ball would be much greater than that same force acting on a truck. This is due to the differences in their masses.


Newton’s third law states that for every action (force) there is an equal and opposite reaction.



As you can see from the example in our video, forces are found in pairs. There are no isolated forces. A system cannot pick itself up into motion with purely internal forces, to achieve a net force an acceleration it must interact with an external force.


Any questions? Still not clear?  Feel free to ask me anything or share your comments below. I look forward to hearing from you.

My own fascination with science began when I was just six years old. My father, a fabrication engineer, was the first to put a spanner in my hand. He showed me how the gearbox worked on his old Hillman car and from then on I was hooked on all things technical. It was that early enthusiasm and curiosity that has guided me throughout my career as an engineer, and I hope that by sharing it with you I can help get you involved in this exciting and engaging field of invention, innovation and discovery.


The science of engineering is no longer the territory of middle-aged men in lab coats, pacing about the lecture hall. In fact, here in Britain, it’s part of our heritage. The roots of engineering began in England during the 17th century where none other than Sir Isaac Newton developed the three Laws of Motion. The British influence continued both in the UK and Europe during the Industrial Revolution, where mechanical engineers harnessed the power to create machines and develop the tools to maintain them.


Today, engineering plays a vital role in our daily lives, affecting the water we drink, the homes we live in, our methods of transport, and the myriad technologies we use at home and at work. The practical applications are endless!


Once you understand the basics, you can apply this knowledge to almost any problem you’ve got. Want to learn more? Visit the “Ask Me Anything” page and submit your own questions. I look forward to hearing from you!