First Law Of Motion Formula Class 9

The first equation of motion is v u at where v is the final velocity and u is the initial velocity of the body.

First law of motion formula class 9.

Newton s first law is also known as the law of inertia. Sir isaac newton published three laws in the 17 th century. First equation of motion gives velocity acquired by body at any time t. The first law of motion implies that things cannot start stop or change direction all by themselves.

Without having a grip on the formulas students will face lots of difficulties solving problems on topics like optics electric current electromagnetism laws of motion electromagnetic radiation etc. In this article we are going to talk about newton s 1 st law. It requires some force from the outside to cause such a change. Newton s first law of motion.

Newton s first law of motion. V after the body travels from a to b at a uniform acceleration of a in the graph oc is the time t. We shall now learn about newton s first law of motion. There are three equations of bodies moving with uniform acceleration which we can use to solve problems of motion.

This property of massive bodies to resist changes in their state of motion is called inertia. The three laws of motion were first compiled by sir isaac newton in his work principia mathematica first published in 1687. The first law states that if the net force the vector sum of all forces acting on an object is zero then the velocity of the object is constant. This law does an introduction of motion of the object and the force acting on it.

The first law of motion is stated as. First equation of motion. Understanding first law with an example frequently asked questions. Consider the diagram of the velocity time graph of a body below.

Motion of class 9 when the body is moving along a straight line with uniform acceleration a relation can be established between velocity of the body acceleration of the body and the distance travelled by the body in a specific time by a set of equations. Therefore the statement that the object s velocity is constant is a statement that both its speed and the direction of its motion are constant. Newton used these laws to explain and investigate the motion of many physical objects and systems. In this the body is moving with an initial velocity of u at point a the velocity of the body then changes from a to b in time t at a uniform rate in the above diagram bc is the final velocity i e.

This pdf sheet consist of chapter force and laws of motion of class 9 physics and updated with all important formula concept with bullet points.