Try each question on your own first. Use the Show Answer button only after you have selected your option, then read the explanation and revise the related concept from your chapter notes.
1. Which of the following physical quantities is a vector quantity?
A. Distance
B. Speed
C. Displacement
D. Time
Answer: C. Displacement
Explanation: Displacement has both magnitude and direction, making it a vector quantity, whereas distance and speed have only magnitude (scalars).
2. What is the SI unit of acceleration?
A. m/s
B. m/s²
C. m·s
D. km/h
Answer: B. m/s²
Explanation: Acceleration is the rate of change of velocity per unit time. Its SI unit is meters per second squared (m/s² or m·s⁻²).
3. If an object moves along a circular path of radius r and completes one full round, its displacement is:
A. 2πr
B. πr
C. Zero
D. 2r
Answer: C. Zero
Explanation: Since the initial position and final position are identical after completing one full round, the net displacement is zero (though distance is 2πr).
4. Slope of a velocity-time graph gives which physical quantity?
A. Distance
B. Displacement
C. Speed
D. Acceleration
Answer: D. Acceleration
Explanation: The slope of a velocity-time graph represents Δv / Δt, which is acceleration. (The area under it gives displacement).
5. Which of the following equations represents the second equation of motion?
A. v = u + at
B. s = ut + ½ at²
C. v² - u² = 2as
D. v = s / t
Answer: B. s = ut + ½ at²
Explanation: The 1st equation is v = u + at, the 2nd is s = ut + ½ at² (position-time relation), and the 3rd is v² = u² + 2as.
6. What type of motion is executed by an athlete running at a constant speed along a circular track?
A. Uniform Linear Motion
B. Accelerated Motion
C. Non-uniform Speed Motion
D. Retarded Motion
Answer: B. Accelerated Motion
Explanation: Even at constant speed, the direction of motion continuously changes at every point in circular motion, meaning velocity changes—making it accelerated motion.
7. To convert a speed from km/h to m/s, we multiply it by:
A. 18 / 5
B. 5 / 18
C. 10 / 36
D. 1000 / 60
Answer: B. 5 / 18
Explanation: 1 km/h = 1000 m / 3600 s = 5 / 18 m/s. Therefore, multiply km/h by 5/18 to get m/s.
8. The area under a speed-time (or velocity-time) graph represents:
A. Acceleration
B. Distance / Displacement
C. Velocity
D. Time taken
Answer: B. Distance / Displacement
Explanation: Area = speed × time = distance. The bounded area under a velocity-time graph equals total distance/displacement covered.
9. When a body travels equal distances in equal intervals of time, its motion is said to be:
A. Non-uniform
B. Uniform
C. Accelerated
D. Retarded
Answer: B. Uniform
Explanation: By definition, covering equal distances in equal intervals of time (no matter how small the time interval) defines uniform motion.
10. A train starts from rest and attains a velocity of 72 km/h in 5 minutes. Assuming uniform acceleration, what is its acceleration?
A. 1/15 m/s²
B. 2/15 m/s²
C. 0.2 m/s²
D. 4 m/s²
Answer: A. 1/15 m/s²
Explanation: u = 0, v = 72 × (5/18) = 20 m/s, t = 5 × 60 = 300 s. Acceleration a = (v - u)/t = (20 - 0)/300 = 1/15 m/s² (≈ 0.067 m/s²).
This page contains a chapter-wise objective practice set. Try the questions without checking the answer first, then use the explanation to understand the point you missed. The current page contains 10 questions, so you can practise in smaller sets when you are revising.
Quick revision tip
After the practice set, write down the question numbers you missed and revise only those concepts once more. This makes MCQ practice more useful than repeatedly attempting the same questions without reviewing mistakes.
