Scalar quantity is a type of Physical quantity that has only magnitude. Examples: Volume, speed, time, density, mass and energy. It means the expression in scalar will give the complete meaning. Suppose the mass of a body is 10 kg. It means it has a unit here is Kg and a numerical value that is 10. So the parameters of scalar quantities are –

• A unit that expresses the measurement completely
• A number or a numerical value that makes it easy to understand that unit with an accurate number.

There are some pure scalars and this does not have any unit as pie or π, e² and some other similar types. A number of expressions are there in which you just need to understand that it has proper direction or not, in case you do not have proper knowledge about a scalar, then you can be confused as the only difference between a scalar and a vector is a proper direction.

Links of Previous Main Topic:-

• Introduction to statics
• Idealizations of mechanics
• Laws of mechanics
• The law of parallelogram
• Types of forces
• Coplanar collinear
• Coplanar concurrent
• Coplanar parallel forces
• Coplanar non concurrent and non parallel

Links of Next Mechanical Engineering Topics:-

• Vector quantity
• Free vector
• Sliding vector
• Fixed vector
• Law of the triangle of forces
• Lamis theorem

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