The branch of

**physics**dealing with**motion**and forces. The word's origin can be traced back to the ancient Greek words for machine, μηχανή ( mekhane ), a clever device for doing work; and mechanic, μηχανικός ( mekhanikos ), a person skilled with machines.**Physics**is the study of energy and matter in space and time and how they are related to each other. Physicists assume the existence of mass, length, time and electric current and then**define**(give the meaning of) all other physical quantities in terms of these basic units.Newton's

**Laws of Motion**There was this fellow in England named Sir Isaac Newton. A little bit stuffy, bad hair, but quite an intelligent guy. He worked on developing calculus and**physics**at the same time. During his work, he came up with the three basic ideas that are applied to the**physics**of most**motion**(NOT modern**physics**).Basketball

**Physics**. We know that**projectile motion**is a type of two-dimensional**motion**or**motion**in a plane. It is assumed that the only force acting on a projectile (the object experiencing**projectile motion**) is the force due to gravity. But how can we**define****projectile motion**in the real world?**Projectile motion**is the**motion**of an object through the air that is subject only to the acceleration of gravity. To solve**projectile motion**problems, perform the following steps: 1. Determine a coordinate system. Then, resolve the position and/or velocity of the object in the horizontal and vertical components.Analysing Linear

**Motion**. Linear**motion**is**motion**in a straight line. Non-linear**motion**is**motion**that is not in a straight line. When analysing linear and non-linear**motion**, distance, displacement, speed, velocity, acceleration and deceleration are some commonly encountered physical quantities. Terms Used To**Define****Motion**Distance and DisplacementTypically, we

**define**the positive vertical direction as upwards, and the positive horizontal direction is usually the direction of the object’s**motion**. When this is the case, the vertical acceleration, g g size 12{g} {} , takes a negative value (since it is directed downwards towards the Earth).