# How did Newton find the first law of motion?

The motion of an aircraft through the air can be explained and described by physical principals discovered over 300 years ago by Sir Isaac Newton. Some twenty years later, in 1686, he presented his three laws of motion in the "Principia Mathematica Philosophiae Naturalis."
A.

### What is the definition of Newton's first law of motion?

First Law Of Motion. Isaac Newton's first law of motion, also known as the law of inertia, states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless acted upon by unbalanced force.
• #### Why do you go to the right when the car turns left?

The car is turning to the right due to the inward force, yet you feel as though you are being forced leftward or outward. In actuality, the car is beginning its turning motion (to the right) while you continue in a straight line path. This is Newton's first law of motion.
• #### What is the first law of motion?

An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This law is often called. "the law of inertia".
• #### What is the friction?

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
B.

### What are the 3 laws of Newton?

Some twenty years later, in 1686, he presented his three laws of motion in the "Principia Mathematica Philosophiae Naturalis." Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
• #### What is the net force?

A net force is the sum of all forces acting on an object. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.
• #### What is inertia in science?

Inertia is the resistance of any physical object to any change in its position and state of motion. This includes changes to the object's speed, direction, or state of rest. Inertia is also defined as the tendency of objects to keep moving in a straight line at a constant velocity.
• #### What is motion in physics?

In physics, motion is a change in position of an object over time. Motion is described in terms of displacement, distance, velocity, acceleration, time, and speed. One can also speak of motion of shapes and boundaries.

Updated: 17th October 2018