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Question

What is meant by scalar and be tired quantities?

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Dear student

I think you did some typing mistake there is no such thing like be tired quantity.Your question is What is meant by scalar and be tired quantities.

Actual question will be what is scalar and vector quantity

Here is the solution

Scalar quantities are specified only by their magnitude. Vector quantities are specified by their magnitude as well as their direction.

Scalar

A scalar is a physical quantity that has only a magnitude (size).

For example, a person buys a tub of margarine which is labelled with a mass of 500g. The mass of the tub of margarine is a scalar quantity. It only needs one number to describe it, in this case, 500g.

Vectors are different because they are physical quantities which have a size anda direction. A vector tells you how muchof something there is and which direction it is in.

Vector

A vector is a physical quantity that has both a magnitude and a direction.

For example, a car is travelling east along a freeway at 1100 km/hr.What we have see here is a vector called the velocity. The car is moving at 100 km/hr (this is the magnitude) and we know where it is going – east (this is the direction). These two quantities, the speed and direction of the car, (a magnitude and a direction) together form a vector we call velocity.

Examples of scalar quantities:

  • mass has only a value, no direction

  • electric charge has only a value, no direction

Examples of vector quantities:

  • force has a value and a direction. You push or pull something with some strength (magnitude) in a particular direction

  • weight has a value and a direction. Your weight is proportional to your mass (magnitude) and is always in the direction towards the centre of the earth.


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