Notes

Newton’s second law
is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. The momentum of a body is equal to the product of its mass and its velocity. Momentum, like velocity, is a vector quantity, having both magnitude and direction. A force applied to a body can change the magnitude of the momentum or its direction or both.

Newton’s third law
states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction. This law is important in analyzing problems of static equilibrium, where all forces are balanced, but it also applies to bodies in uniform or accelerated motion

The 1st law
motion implies that they cannot start stop or change direction all by themselves, and it requires some force from the outside to cause such a change. This property of massive body to resist changes state of motion is call inertia. An object at rest remains at rest, and an object in motion at constant speed and in a straight line unless acted on by an unbalance force

who was sir newtons?
English physicist and mathematician, who was the culminating figure of the Scientific Revolution of the 17th century.