Motion in One Dimension – Complete Explanation (Physics 2026)

Motion in One Dimension is the foundation of Kinematics. Every major Physics chapter like projectile motion, laws of motion, and gravitation starts from here.

At CHEMASH, we teach this topic with deep conceptual clarity + exam-focused numericals for Class 9–12, JEE & NEET 2026.

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Table of Contents

• Introduction to 1D Motion
• Distance & Displacement
• Velocity & Speed
• Acceleration
• Equations of Motion
• Motion Graphs
• Solved Numericals
• MCQs
• FAQs
• Why CHEMASH?

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1️⃣ Introduction to Motion in One Dimension

When an object moves along a straight line (x-axis only), it is called one-dimensional motion.

Examples:

• Car moving on straight road
• Free falling object
• Train moving on straight track

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2️⃣ Distance vs Displacement

Distance	Displacement
Scalar quantity	Vector quantity
Total path covered	Shortest path between initial & final position

Important for Boards & JEE conceptual questions.

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3️⃣ Speed & Velocity

Speed = Distance / Time
Velocity = Displacement / Time

Velocity has direction. Speed does not have direction.

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4️⃣ Acceleration

Acceleration = Change in Velocity / Time

Unit = m/s² Dimension = [LT⁻²]

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5️⃣ Equations of Motion

1) v = u + at
2) s = ut + ½at²
3) v² = u² + 2as

These are valid only for uniform acceleration.

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6️⃣ Motion Graphs

• Slope of displacement-time graph → Velocity
• Slope of velocity-time graph → Acceleration
• Area under velocity-time graph → Displacement

Kinematics Explanation – Physics Classroom

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7️⃣ Solved Numerical (2026 Level)

Q: A car starts from rest and accelerates at 2 m/s² for 5 seconds. Find final velocity.

Using v = u + at u = 0 v = 0 + (2 × 5) = 10 m/s

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8️⃣ MCQs (Boards + JEE + NEET)

1. If acceleration is zero, velocity will be: A) Increasing B) Decreasing C) Constant ✔ D) Zero

Answer: C
Explanation: Zero acceleration means no change in velocity.

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9️⃣ Frequently Asked Questions

Is this chapter important for JEE 2026?
Yes, very important. Many direct and concept-based questions are asked.

Does CHEMASH provide practice sheets?
Yes. We provide detailed problem-solving practice for all levels.

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Why Study Motion with CHEMASH?

• Low budget tuition
• Experienced & supportive teachers
• Concept + Numericals focus
• Trusted by students & parents
• Classes for 6–12, JEE & NEET

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