Орал қаласы 2018 жыл

Physical quantity

We can divide or multiply different physical quantities. Let’s say, you run 100 meters in 10 seconds. Divide 100 meters by 10 seconds and we get 10 meter/ second, which is your speed.

We cannot add or subtract different quantities. Try to 100 meters and 10 seconds. What is your answer?

Physical quantities can be grouped into two groups: quantities that have direction and quantities that have no direction.

We know six principal directions: upward, downward, left, right, from us, to us. Arrows are used to denote direction.

Physical quantities that have no direction are called scalars. For example 60 seconds, 50 kilogram, 7 m³ are scalars.

Physical quantities that have direction are called vectors. For example 17 meters to the right, 10 m/s upwards, etc.