Describing Motion Around Us-Assignments - What Have You Learned? Science Exploration Class 9 In English-CBSE Notes
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Class 9 Science Exploration Exploration Chapter 4 Describing Motion Around Us Assignments - What Have You Learned?
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All Topics Chapter Describing Motion Around Us
- 1. Chapter Review and Key Points
- 2. Motion in a Straight Line
- 3. Measuring Motion
- 4. Types of Motion
- 5. Graphical Representation of Motion
- 6. Assignments - What Have You Learned?
Notes
Describing Motion Around Us-Assignments - What Have You Learned? Science Exploration Class 9 In English-CBSE Notes
Describing Motion Around Us
Assignments - What Have You Learned?
Chapter 4. Describing Motion Around Us
This assignment is based on the complete chapter and follows the latest CBSE competency-based assessment pattern. It includes objective, descriptive, case-based and higher-order thinking questions to strengthen conceptual understanding and problem-solving skills.
Chapter Assignment
1. One Word Answer
- The change in the position of an object with time.
- A fixed point used to describe the position of an object.
- The total length of the actual path travelled.
- The shortest distance between the initial and final positions.
- The distance travelled per unit time.
- The displacement per unit time.
- The rate of change of velocity.
- Motion with constant speed.
- Motion along a circular path with constant speed.
- The SI unit of acceleration.
2. Fill in the Blanks
- Motion is described with respect to a __________ point.
- Distance is a __________ quantity.
- Displacement is a __________ quantity.
- Speed is measured in __________.
- Velocity depends on __________.
- Acceleration is the rate of change of __________.
- In uniform motion, acceleration is __________.
- The slope of a distance-time graph represents __________.
- The area under a velocity-time graph gives __________.
- Uniform circular motion has constant __________ but changing velocity.
3. True or False
- An object can be at rest for one observer and in motion for another.
- Distance can never be less than displacement.
- Velocity is a scalar quantity.
- Speed can never be negative.
- Displacement may be zero even when distance is not zero.
- Uniform motion means constant acceleration.
- The slope of a velocity-time graph gives acceleration.
- The area under a velocity-time graph gives displacement.
- In uniform circular motion, the direction of motion changes continuously.
- Acceleration is measured in m/s².
4. Match the Following
| Column A | Column B |
|---|---|
| Distance | Total Path Length |
| Displacement | Shortest Distance |
| Speed | Distance ÷ Time |
| Velocity | Displacement ÷ Time |
| Acceleration | Change in Velocity ÷ Time |
| Distance-Time Graph | Slope gives Speed |
| Position-Time Graph | Slope gives Velocity |
| Velocity-Time Graph | Slope gives Acceleration |
| Area under Velocity-Time Graph | Displacement |
| Uniform Circular Motion | Constant Speed |
5. Very Short Answer Questions
- Define motion.
- What is a reference point?
- Define distance.
- Define displacement.
- State the SI unit of speed.
- Define average velocity.
- What is acceleration?
- What is uniform motion?
- State one difference between speed and velocity.
- Why is velocity a vector quantity?
6. Short Answer Questions
- Differentiate between distance and displacement.
- Differentiate between speed and velocity.
- Explain the concept of a reference point with an example.
- Describe uniform and non-uniform motion with examples.
- Explain the importance of acceleration in daily life.
- Differentiate between average speed and average velocity.
- Explain why motion is relative.
- Describe the characteristics of uniform circular motion.
- Write any four applications of equations of motion.
- Explain how graphs help in studying motion.
7. Long Answer Questions
- Explain motion, reference point and position with suitable examples.
- Describe distance and displacement with a comparison table.
- Explain speed, velocity and acceleration along with their SI units and formulas.
- Describe uniform and non-uniform motion with suitable examples.
- Explain the graphical representation of motion.
- Describe the position-time, distance-time and velocity-time graphs.
- Explain the equations of motion and their applications.
- Describe uniform circular motion and explain why it is an accelerated motion.
- Explain the relationship between the slope and area of different motion graphs.
- Discuss the importance of studying motion in science and everyday life.
8. Case Study Questions
Case Study – 1
A car travels 120 km in 2 hours on a straight highway at a constant speed.
- What type of motion is shown by the car?
- Calculate its average speed.
- What will be the shape of its distance-time graph?
- Is the acceleration zero or non-zero?
Case Study – 2
A student walks 20 m east and then 20 m west, returning to the starting point.
- Calculate the total distance travelled.
- What is the displacement?
- Why are the values of distance and displacement different?
- Which quantity is a vector?
Case Study – 3
A cyclist increases his speed from 5 m/s to 15 m/s in 5 seconds.
- Has the cyclist accelerated or decelerated?
- Calculate the acceleration.
- Which graph can best represent this motion?
- Which physical quantity changes during this motion?
Case Study – 4
A satellite revolves around the Earth with constant speed in a circular orbit.
- What type of motion is shown by the satellite?
- Why is the satellite considered to be accelerating?
- Does its speed change?
- What changes continuously during its motion?
Case Study – 5
A student observes a horizontal line on a distance-time graph.
- What does the graph indicate?
- What is the speed of the object?
- Is the object moving or at rest?
- How will the graph change if the object starts moving with uniform speed?
9. Competency-Based Questions
- Why is a reference point necessary to describe motion?
- How can two objects have the same speed but different velocities?
- Why is displacement never greater than distance?
- How does acceleration improve vehicle safety analysis?
- Why is a velocity-time graph more informative than a distance-time graph?
- How can graphs help compare the motion of two vehicles?
- Why is motion in a circular path considered accelerated motion?
- How are equations of motion useful in sports and transportation?
- Why are SI units important while measuring motion?
- How do graphical representations make the study of motion easier?
10. HOTS Questions
- A person completes one full lap of a circular track. Explain why the distance is not zero but the displacement is zero.
- Can an object have zero velocity and still have non-zero acceleration? Justify your answer.
- Why is a person sitting inside a moving train considered both at rest and in motion at the same time?
- A car moves with constant speed around a circular track. Why is its velocity not constant?
- Can the average speed and average velocity of an object ever be equal? Explain with an example.
- How would traffic management become difficult if the concepts of speed and acceleration were ignored?
- Why is the slope of a graph considered more useful than only reading plotted points?
- How do motion graphs help scientists predict future motion?
- A vehicle returns to its starting point after a journey. Which quantities become zero and which remain non-zero? Explain.
- Why is understanding motion considered the foundation for studying higher concepts of Physics?
All Topics Chapter Describing Motion Around Us
Describing Motion Around Us-Assignments - What Have You Learned? Science Exploration Class 9 In English-CBSE Notes
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