*Topic: Scalar and Vector | Definitions*

Scalar and Vector are two distinct quantities of measurements.

*Scalar is a single dimension quantity whereas the Vector is a two-dimensional quantity.*

Scalar has a magnitude and vector will have both magnitude and direction.

*Make sense?…… No? …… Here is a small example*

When we describing the motion of an object or measuring a physical quantity or work, we used to say in phrases moving fast, running fast or eating fast/slow but in physics, this quantity can be described in two types of physical quantities. Those we this scalar and vector. Let’s say Sundar ate five apples. the five quantity is a scalar when we say Sundar ate five apples in three minutes this comes under a Vector quantity.

see this example,

The object has moved a distance of one meter. This is a scalar

The object has moved with a velocity of 1meter/second. Or this can be expressed in a direction(The object has moved one meter towards the right). This is a vector.

In physics, Measuring units are divided into scalar and vector quantities. those were listed below.

## Scalar and Vector Quantities

### Scalar Quantities

Time (s)

Distance (m)

Mass (Kg)

Speed (m/s)

Power (Kw)

Gravitational energy (J)

Temperature (k or °C)

Pressure (Pa)

Kinetic energy (J)

Potential Difference (V)

Current (A)

Resistance (Ω)

### Vector Quantities

Velocity (m/s)

Displacement (m)

Acceleration (m/s²)

Force (N)

Weight (N)

Moment (Nm)

**Are you wondered why speed is a scalar since it’s having two quantities, whereas velocity is a vector with the same quantities?**

Speed describes how fast can an object moves and velocity describes the rate at which an object can moves. This is the difference.

The same kind of confusion you will get with the distance and displacement.

**Recently I found this situation, ft-lb and lb-ft are not the same.**

ft-lb is used to measure energy so it is a scalar quantity on the other side the lb-ft is torque measurement which is a vector quantity.

Tags:

What is Scalar?, What is Vector?, What is the difference between scalar and vector?

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