First Law Of Motion Formula Class 9

Consider the diagram of the velocity time graph of a body below.

First law of motion formula class 9.

This property of massive bodies to resist changes in their state of motion is called inertia. Newton used these laws to explain and investigate the motion of many physical objects and systems. Newton s first law is also known as the law of inertia. Chapter force and laws of motion physics formula is useful for quick revision understand the application of physics formula in class 9 help you to solve questions of force and laws of motion in.

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. The three laws of motion were first compiled by sir isaac newton in his work principia mathematica first published in 1687. The first equation of motion is v u at where v is the final velocity and u is the initial velocity of the body. Velocity is a vector quantity which expresses both the object s speed and the direction of its motion.

Students of the 9th standard are advised to learn the physics formula lists thoroughly to build a strong grip on the subject. First equation of motion. The first law of motion implies that things cannot start stop or change direction all by themselves. It requires some force from the outside to cause such a change.

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. Newton s first law of motion. First equation of motion gives velocity acquired by body at any time t. There are three equations of bodies moving with uniform acceleration which we can use to solve problems 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. This law does an introduction of motion of the object and the force acting on it. Sir isaac newton published three laws in the 17 th century. The first law of motion is stated as.

Understanding first law with an example frequently asked questions. We shall now learn about newton s first law of motion. 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. Newton s first law of motion.

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.