INTERMEDIATE PHYSICS – LESSON 2
MOTION IN A STRAIGHT LINE
STAGE–2 : IMPORTANT QUESTIONS, ANSWERS & NUMERICALS
🔹 A. VERY SHORT ANSWER QUESTIONS (2 MARKS)
Q1. What is motion?
An object is said to be in motion if its position changes with respect to time and a reference point.
Q2. What is rest?
An object is said to be at rest if its position does not change with time relative to a reference point.
Q3. Define displacement.
Displacement is the shortest distance between the initial and final positions of an object in a given direction.
Q4. What is velocity?
Velocity is the rate of change of displacement with respect to time.
Q5. Define acceleration.
Acceleration is the rate of change of velocity with respect to time.
🔹 B. SHORT ANSWER QUESTIONS (4 MARKS)
Q1. Explain the difference between distance and displacement.
| Distance | Displacement |
|---|---|
| Actual path length | Shortest distance |
| Scalar quantity | Vector quantity |
| Always positive | Can be zero or negative |
Q2. Define speed and velocity. State their differences.
Speed: Distance travelled per unit time.
Velocity: Displacement per unit time.
- Speed is scalar; velocity is vector
- Speed is always positive; velocity can be zero or negative
Q3. What is uniform motion?
An object is said to be in uniform motion if it covers equal distances in equal intervals of time.
🔹 C. LONG ANSWER QUESTIONS (8 MARKS)
Q1. Explain different types of motion in a straight line.
Motion along a straight line is called one-dimensional motion. It can be classified as:
- Uniform motion – constant velocity
- Non-uniform motion – changing velocity
- Accelerated motion – velocity increases
- Retarded motion – velocity decreases
Examples should be written clearly in exams to score full marks.
🔹 D. NUMERICAL PROBLEMS (VERY IMPORTANT)
Numerical 1: A car travels 120 km in 3 hours. Find its average speed.
Solution:
Speed = Distance / Time
= 120 / 3 = 40 km/h
Numerical 2: A body starts from rest and attains a velocity of 20 m/s in 10 s. Find its acceleration.
Solution:
u = 0, v = 20 m/s, t = 10 s
Acceleration = (v − u) / t
= (20 − 0) / 10 = 2 m/s²
Numerical 3: A train covers equal distances in equal intervals of time. What type of motion is this?
Answer: Uniform motion.
🎯 INTERMEDIATE EXAM TIPS
- Always write definitions clearly
- Use correct symbols and units
- Draw neat distance–time graphs if asked
- Numericals are easy scoring – practice daily
➡️ NEXT: STAGE–3 – IIT MATERIAL + JEE QUESTIONS (LESSON–2)
Intermediate Physics Complete Notes – IIT JEE & Board Exams
This page contains complete Intermediate Physics notes along with IIT JEE materials, previous year questions, solved problems, diagrams, and exam strategies.
📘 Lesson 1: Units and Measurements
📘 Lesson 2: Motion in a Straight Line
📘 Lesson 3: Motion in a Plane
- Part 1
- Part 2
- Part 3
- Part 4
- Part 5
- Part 6
- Part 7
- Part 8
- Part 9
- Part 10
- Part 11
- Part 12
- Part 13
- Part 14
- Part 15
- Part 16
- Part 17
This page is updated regularly with new lessons.
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