Preparing for CUET General Test ? Let’s start your General Science journey with one of the most important and scoring topics Units and Motion. This forms the base of Physics and helps you solve both theory and numerical questions easily.

In this blog, you’ll get simple explanations, key formulas, and exam-focused points.

What Are Units?

Units are standard measurements used to express physical quantities. You don’t need to memorize long definitions focus on concepts and MCQs.

Fundamental (Basic) Units

These are the base units in Physics:

• Length → Meter (m)
• Mass → Kilogram (kg)
• Time → Second (s)
• Electric Current → Ampere (A)
• Temperature → Kelvin (K)
• Luminous Intensity → Candela (cd)
• Amount of Substance → Mole (mol)

These are the building blocks for all other units.

Watch Complete video for Full explanation

Supplementary Units

• Plane Angle → Radian
• Solid Angle → Steradian

Plane angle is used in 2D (circle), while solid angle is used in 3D (sphere).

Derived Units

Derived units are formed using fundamental units.

Example:
Volume = Length × Breadth × Height
Unit = m × m × m = m³

So, volume is a derived unit.

Other Important Units

• Light Year → Distance travelled by light in one year
• Parsec → Astronomical distance unit
• Metric Ton / Quintal → Used for mass

Dimensions (Basic Idea)

Dimensions represent physical quantities using symbols:

• Length → L
• Mass → M
• Time → T

Example: Velocity = LT⁻¹

Motion Basics

Now let’s move to motion a very important scoring topic in CUET.

Distance vs Displacement

Concept	Distance	Displacement
Meaning	Total path covered	Shortest path
Type	Scalar	Vector
Direction	Not needed	Required

Key Point:
Displacement ≤ Distance

Speed vs Velocity

Concept	Speed	Velocity
Type	Scalar	Vector
Depends on	Distance	Displacement + Direction

Even if speed is constant, velocity can change due to direction change (like circular motion).

Average Speed & Velocity

• Average Speed = Total Distance / Total Time
• Average Velocity = Total Displacement / Total Time

Relative Velocity

Relative velocity means comparing motion of one object with respect to another.

Example:
When sitting inside a moving metro, you feel at rest because your velocity is relative to the metro.

Acceleration

Acceleration is the rate of change of velocity.

$a = \frac{v – u}{t}$a=tv−u​

Where:

• u = Initial velocity
• v = Final velocity
• t = Time

👉 Unit: m/s²
👉 Type: Vector quantity

Equations of Motion (Very Important)

These are must-learn formulas for numericals:

First Equation

$v = u + at$v=u+at

Second Equation

$s = ut + \frac{1}{2}at^2$s=ut+21​at2

Third Equation

$v^2 = u^2 + 2as$v2=u2+2as

👉 These equations are frequently asked in CUET MCQs.

Scalar vs Vector Quantities

Scalar (only magnitude)

• Speed
• Mass
• Time
• Distance
• Work

Vector (magnitude + direction)

• Displacement
• Velocity
• Acceleration
• Momentum

CUET Preparation Tips

• Focus on concept clarity, not mugging definitions
• Practice MCQs regularly
• Learn formulas + units together
• Solve numericals from motion (very important)

Conclusion

Units and Motion are foundational topics in Physics and extremely important for CUET General Test. Once your basics are clear, solving advanced questions becomes much easier.

Stay consistent, practice daily, and keep revising formulas.