## Want to learn ‘Motion in a Plane’? Read this first

Learning ‘Motion in a Plane’ can get tough. A whole bunch of unfamiliar terms to deal with and no specific place where you can find all the answers. But don’t worry, we’ve laid down all the basics that you’ll need, stepwise, that will kick-start your learning process and help you all throughout the way to learn and master Motion in a Plane.

The first step is understanding Scalar and Vector Quantities

Vectors have magnitude and direction, scalars only have magnitude. The fact that magnitude occurs for both scalars and vectors can lead to some confusion. There are some quantities, like speed, which have very special definitions for scientists. By definition, speed is the scalar magnitude of a velocity vector.

For example, the speed and direction of a car, (a magnitude and a direction) together form a vector we call velocity.

Scalar quantities: mass has only a value, no direction. Electric charge has only a value, no direction.

A scalar quantity has only magnitude.

A vector quantity has both magnitude and direction.

Position and Displacement Vectors

Displacement is defined as the distance, in any direction, of an object relative to the position of another object. Physicists use the concept of a position vector as a graphical tool to visualize displacements. A position vector expresses the position of an object from the origin of a coordinate system.

A displacement is a vector that is the shortest […]