Back to all solutions

SCIENCE CLASS- 9

Class 9 Science Worksheets: Chapter-4

Chapter-wise worksheets with competency-based questions and board exam practice based on the latest CBSE syllabus.

CBSE Latest Syllabus Chapter-wise Worksheets

Worksheet

Chapter 4: Describing Motion Around Us

Class: IX     Subject: Science (Physics)

Name: _______________________     Roll No.: _______________________

Date: _______________________     Marks: 50     Time: 60 Minutes


Section A : Multiple Choice Questions

Choose the correct answer.

  1. Speed is equal to
    1. Distance × Time
    2. Distance ÷ Time
    3. Time ÷ Distance
    4. Velocity × Time

  2. Which of the following is a vector quantity?
    1. Distance
    2. Speed
    3. Velocity
    4. Time

  3. The slope of a position-time graph gives
    1. Acceleration
    2. Velocity
    3. Distance
    4. Time

  4. The SI unit of acceleration is
    1. m/s
    2. m/s²
    3. km/h
    4. m²/s

  5. A body moving with constant velocity has
    1. Positive acceleration
    2. Negative acceleration
    3. Zero acceleration
    4. Infinite acceleration

  6. Area under a velocity-time graph represents
    1. Distance
    2. Velocity
    3. Displacement
    4. Acceleration

  7. Which quantity is always positive?
    1. Velocity
    2. Acceleration
    3. Distance
    4. Displacement

  8. If displacement is zero, average velocity is
    1. Maximum
    2. Zero
    3. Infinite
    4. Cannot be determined

  9. The SI unit of velocity is
    1. km/h
    2. m/s
    3. cm/s
    4. m/s²

  10. A horizontal line on a velocity-time graph represents
    1. Uniform velocity
    2. Increasing velocity
    3. Decreasing velocity
    4. Zero displacement

Section B : Fill in the Blanks and True/False

Fill in the Blanks

  1. Average speed = _______________________ ÷ Time.
  2. The SI unit of distance is _______________________.
  3. The slope of a velocity-time graph gives _______________________.
  4. Distance is a _______________________ quantity.
  5. Velocity is a _______________________ quantity.

Write True or False

  1. Speed can never be negative. __________
  2. Distance is always equal to displacement. __________
  3. Acceleration can be negative. __________
  4. Velocity has both magnitude and direction. __________
  5. Area under a velocity-time graph gives displacement. __________

Section C : Match the Following

Column A Column B
1. Speed A. Slope of velocity-time graph
2. Velocity B. Scalar quantity
3. Acceleration C. Displacement ÷ Time
4. Position-Time Graph D. Distance ÷ Time
5. Velocity-Time Graph E. Slope gives Velocity

Section D : Short Answer and Numerical Questions

Answer the following.

  1. Differentiate between distance and displacement.

  2. Define:
    • Speed
    • Velocity

  3. What is acceleration?

  4. Why can an object have zero displacement but non-zero distance?

  5. Why is velocity called a vector quantity?

  6. A car travels 180 km in 3 hours. Find its average speed.

  7. A cyclist moves 240 m in 30 s. Calculate the average velocity.

  8. A train increases its speed from 10 m/s to 30 m/s in 5 s. Find the acceleration.

  9. Convert:
    • 72 km/h into m/s
    • 20 m/s into km/h

  10. An object starts from rest and accelerates uniformly at 4 m/s² for 6 s. Find its final velocity.

Section E : HOTS and Case Study

Assertion and Reason

Choose the correct option.

  1. Assertion (A): Distance is always greater than or equal to displacement.

    Reason (R): Distance is the actual path travelled.
    1. Both A and R are true and R is the correct explanation.
    2. Both A and R are true but R is not the correct explanation.
    3. A is true but R is false.
    4. A is false but R is true.

  2. Assertion (A): The slope of a velocity-time graph gives acceleration.

    Reason (R): Acceleration is the rate of change of velocity.
    1. Both A and R are true and R is the correct explanation.
    2. Both A and R are true but R is not the correct explanation.
    3. A is true but R is false.
    4. A is false but R is true.

Case Study

Rahul travels from his home to school by bicycle. He first rides 2 km towards the east and then 3 km towards the north. He completes the journey in 30 minutes.

  1. Find the total distance travelled by Rahul.
  2. Is his displacement equal to the distance? Give a reason.
  3. Calculate Rahul's average speed.
  4. Name the quantity that depends only on the initial and final positions.
  5. Which graph can be used to determine Rahul's velocity?

Bonus Challenge

A car starts from rest and accelerates uniformly at 2 m/s² for 10 s.

  1. Find the final velocity.
  2. Find the distance travelled.
  3. Draw the velocity-time graph.
  4. Calculate the area under the graph.
  5. What physical quantity does this area represent?

End of Worksheet