Introduction to Newton's Law of Motion

Newton's Law of Motion

Sir Isaac Newton Law of Motion change the way scientist understand physic. Sir Isaac Newton can be named as the greatest scientists and mathematicians that ever lived. He was born in England on December 25, 1643. He went on to Trinity College Cambridge. While at college he became interested in math, physics, and astronomy. While Newton was in college he was deeply affected by Galileo Galilei Inertia theory, so he tries to come up with his own law of motion theory. Later on in his life,Newton's ideas were so good that Queen Anne knighted him in 1705. His accomplishments laid the foundations for modern science and revolutionized the world. Sir Isaac Newton died in 1727.

Newton's first Law of Motion:

An object at rest will remain at rest unless acted upon an external force. An object in motion will  continues to stay in motion with the same speed and in the same direction until acted upon an external  force. This law is also known as “inertia”

From the gif above we can see that the skater move in constant speed and direction until it hit a rock. this is because the wheel of the skate have the tedency to remain at its current motion and speed. However, when the skate hit the rock; the wheel of the skate is acted upon a force that was created by the force when they hit and make the wheel to stop. However, we can also see the blue test tube falling when the skate stop in an instant. this is becase the blue test tube has the tedency to keep moving forward. but since the skate stop the test tube fall down.

Newton's seccond Law of Motion:

The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Actually it is a general knowledge that the heavier the object, it require more force to be move.

From the illustration above, we can see that it require a lot more force to kick a brick wall and try to make it fall. That is because the wall has a very high inertia to stay in its current state compare to the ball. When the blue test tube kick the ball, the ball easily move that is because it is exerted to an externall force. It is possible to break the wall and make it fall, as long the kick can be exert a force that is strong enough to break the inertia of the wall.

Newton's third  Law of Motion:

Newton's third Law of Motion state that "For every action there is an equal and opposite re-action" which means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.

From the illustration above, we can see that the blue test tube that kick the wall feel pain. this is because when it kick the wall with force, the wall also exert equall amount of force but just in the opposite direction. So actually the wall also feel the pain, but because it is a non-living object it cannot show its emotion.