Motion Olympiad (9 Science)
NSO-style olympiad questions on motion, velocity, acceleration, and graphical analysis. Challenging problems requiring deep conceptual understanding and pr
TL;DR: NSO-style olympiad questions on motion, velocity, acceleration, and graphical analysis. Challenging problems requiring deep conceptual understanding a…
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NSO-style olympiad questions on motion, velocity, acceleration, and graphical analysis. Challenging problems requiring deep conceptual understanding and pr
Motion Olympiad MCQs with Answers & Explanations
Q1. An object travels 20m in the first 2 seconds, 30m in the next 3 seconds, and 40m in the final 5 seconds. What is the average velocity for the entire journey?
- 5 m/s
- 6 m/s
- 6.67 m/s ✓ (correct)
- 7.5 m/s
Q2. A car accelerates uniformly from rest. In the first second, it covers 2m. How far will it cover in the second second?
- 2 m
- 4 m
- 6 m ✓ (correct)
- 8 m
Q3. A ball is thrown vertically upward with initial velocity 30 m/s. Taking g = 10 m/s^2, what is the maximum height reached?
- 45 m
- 60 m
- 75 m ✓ (correct)
- 90 m
Q4. An object moving in a circle at constant speed has constant velocity. Is this true or false?
- True, speed and velocity are the same
- False, velocity changes due to change in direction ✓ (correct)
- True, if the radius is constant
- False, speed increases continuously
Q5. The position-time graph of an object is a straight line. What does this indicate?
- The object is accelerating
- The object is moving at constant velocity ✓ (correct)
- The object is at rest
- The object is decelerating
Q6. Two objects A and B start from rest. A travels with uniform acceleration 2 m/s^2 and B with 3 m/s^2 for 5 seconds. Which statement is true?
- A travels more distance
- B travels more distance ✓ (correct)
- Both travel equal distance
- Cannot determine from given info
Q7. A train moving at 20 m/s applies brakes and comes to rest in 10 seconds. What is its deceleration?
- 2 m/s^2 ✓ (correct)
- 20 m/s^2
- 0.5 m/s^2
- 10 m/s^2
Q8. In a velocity-time graph, a curved line indicates what?
- Constant velocity
- Constant acceleration
- Changing acceleration ✓ (correct)
- No motion
Frequently Asked Questions
Why is velocity more useful than speed in physics?
Velocity is a vector quantity that includes both magnitude (speed) and direction, giving complete information about motion. Speed alone doesn't indicate where an object is heading. Velocity allows us to predict future position and apply Newton's laws correctly. In circular or curved motion, objects can have constant speed but changing velocity due to direction change.
How do we interpret the area under a velocity-time graph?
The area under a v-t graph represents displacement. If the graph is above the time axis (positive velocity), the area is positive displacement. If below (negative velocity or backward motion), it's negative displacement. For non-uniform motion, breaking the area into geometric shapes (rectangles, triangles) gives the displacement during that time interval.
More 9 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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