CHAPTER 8: MOTION
🔹 Motion
An object is said to be in motion if its position
changes with time.
🔹 Types of Motion
Rectilinear motion – straight line
Circular motion – circular path
Periodic motion – repeats after equal intervals
Uniform motion – equal distances in equal time
Non-uniform motion – unequal distances
🔹 Distance & Displacement
Distance: total path covered (scalar)
Displacement: shortest distance (vector)
⭐ CLASS 9 PHYSICS – MOTION + LAWS OF MOTION
FORMULA SHEET
🚀 PART 1 – MOTION (Chapter: Motion)
✅ 1. Distance & Displacement
⭐ Concept
Distance: Total path length (scalar)
Displacement: Shortest distance with direction
(vector)
⭐ Where used
, 👉 Conceptual questions
👉 Average speed vs velocity
👉 Graph interpretation
⚠️Trap: displacement can be zero, distance cannot
✅ 2. Speed
⭐ Formula
Distance
Speed=
Time
⭐ Where to use
👉 Basic motion numerical
👉 Uniform motion
👉 Graph slope (distance–time)
✅ 3. Velocity
⭐ Formula
Displacement
Velocity=
Time
⭐ Where to use
👉 Direction involved motion
👉 Average velocity
👉 Equation of motion problems
✅ 4. Average Speed
Total distance
Average speed=
Total time
👉 Non-uniform motion problems
✅ 5. Acceleration
⭐ Formula
v−u
a=
t
🔹 Motion
An object is said to be in motion if its position
changes with time.
🔹 Types of Motion
Rectilinear motion – straight line
Circular motion – circular path
Periodic motion – repeats after equal intervals
Uniform motion – equal distances in equal time
Non-uniform motion – unequal distances
🔹 Distance & Displacement
Distance: total path covered (scalar)
Displacement: shortest distance (vector)
⭐ CLASS 9 PHYSICS – MOTION + LAWS OF MOTION
FORMULA SHEET
🚀 PART 1 – MOTION (Chapter: Motion)
✅ 1. Distance & Displacement
⭐ Concept
Distance: Total path length (scalar)
Displacement: Shortest distance with direction
(vector)
⭐ Where used
, 👉 Conceptual questions
👉 Average speed vs velocity
👉 Graph interpretation
⚠️Trap: displacement can be zero, distance cannot
✅ 2. Speed
⭐ Formula
Distance
Speed=
Time
⭐ Where to use
👉 Basic motion numerical
👉 Uniform motion
👉 Graph slope (distance–time)
✅ 3. Velocity
⭐ Formula
Displacement
Velocity=
Time
⭐ Where to use
👉 Direction involved motion
👉 Average velocity
👉 Equation of motion problems
✅ 4. Average Speed
Total distance
Average speed=
Total time
👉 Non-uniform motion problems
✅ 5. Acceleration
⭐ Formula
v−u
a=
t