**We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 9 Science book Chapter 8 Motion with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 9 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Motion. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 9 free Pdf and prepare to exam and help students understand the concept very well.**

### MCQ Questions for Class 9 Science with Answers Physics

### Q1. The displacement of the object in a unit time is called:

(i) speed

(ii) velocity

(iii) acceleration

(iv) average speed

(ii) velocity

## Q2. Which of the following statement is correct regarding velocity and speed of a moving body?

(i) Velocity of a moving body is always higher than its speed

(ii) Speed of a moving body is always higher than its velocity

(iii) Speed of a moving body is its velocity in a given direction

(iv) Velocity of a moving body is its speed in a given direction

(iv) Velocity of a moving body is its speed in a given direction

## Q3. The numerical ratio of displacement to distance for a moving object is

(i) always less than 1

(ii) always equal to 1

(iii) always more than 1

(iv) equal or less than 1

(iv) equal or less than 1

## Q4. The slope of the distance-time graph is:

(i) Distance

(ii) acceleration

(iii) Speed

(iv) Displacement

(iii) Speed

## Q5. The numerical ratio of displacement to distance for a moving object is :

(i) always less than 1

(ii) equal to 1 or more than 1

(iii) always more than 1

(iv) equal to 1 or less than 1

(iv) equal to 1 or less than 1

## Q6. Speed of 90 km/h when expressed in m/s is

(i) 2.5

(ii) 90000

(iii) 250

(iv) 25

(iv) 25

### Q7. The rate of change of velocity per second is known as:

(i) acceleration

(ii) speed

(iii) average velocity

(iv) linear motion

(i) acceleration

## Q8. Which of the following is most likely not a case of uniform circular motion?

(i) Motion of the earth around the sun

(ii) Motion of a toy train on a circular track

(iii) Motion of a racing car on a circular track

(iv) Motion of hours’ hand on the dial of a clock

(iii) Motion of a racing car on a circular track

## Q9. If the displacement of an object is proportional to square of time, then the object moves with

(i) uniform velocity

(ii) uniform acceleration

(iii) increasing acceleration

(iv) decreasing acceleration

(ii) uniform acceleration

### Q10. Which of the following is a correct measure of velocity?

(i) 30 s

(ii) 30 m/s

(iii) 30 South

(iv) 30 m/s, South

(iv) 30 m/s, South

## Q11. The speed of a moving object is determined to be 0.06 m/s. This speed is equal to :

(i) 2.16 km/h

(ii) 1.08 km/h

(iii) 0.216 km/h

(iv) 0.0216 km/h

(iv) 0.0216 km/h

### Q12. A person travels distance πR along the circumference of a circle of radius R. Displacement of the person is

(i) R

(ii) 2R

(iii) 2πR

(iv) zero

(ii) 2R

## Q13. What is the unit of acceleration?

(i) m/s

(ii) m/s²

(iii) ms

(iv) m/s³

(ii) m/s²

#### Q14. A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of – 0.5 m/s². Find how far the car will go before it is brought to rest?

(i) 8100 m

(ii) 900 m

(iii) 625 m

(iv) 620 m

(iii) 625 m

## Q15. Area under a υ -1 graph represents a physical quantity which has the unit

(а) m²

(ii) m

(iii) m³

(iv) ms-1

(ii) m

## Q16. The S.I. unit of acceleration is:

(i) ms-²

(ii) ms

(iii) ms²

(iv) m

(iii) ms²

#### Q17. When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be :

(i) + 2 m/s²

(ii) – 2 m/s²

(iii) – 0.5 m/s²

(iv) + 0.5 m/s²

(iv) + 0.5 m/s²

## Q18. Name the instrument used to measure instantaneous speed of a vehicle

(i) multimeter

(ii) ammeter

(iii) speedometer

(iv) accelerator

(iii) speedometer

## Q19. The slope of a velocity-time graph gives:

(i) the distance

(ii) the displacement

(iii) the acceleration

(iv) the speed

(iii) the acceleration

## Q20. The numerical ratio of displacement to distance for a moving object is:

(i) Always less than 1

(ii) Equal to 1 or less than 1

(iii) Always more than 1

(iv) Equal to 1 or more than one

(ii) Equal to 1 or less than 1

#### Q21. In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?

(i) If the car is moving on a straight road

(ii) If the car is moving in Circular path

(iii) The pendulum is moving to and fro

(iv) The earth is revolving around the sun.

(i) If the car is moving on a straight road

### Q22. A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?

(i) During downward motion

(ii) When the ball comes to rest

(iii) During upward motion

(iv) When the boy catches the ball

(i) During downward motion

## Q23. If the displacement of an object is proportional to the square of time, then the object moves with:

(i) uniform velocity

(ii) uniform acceleration

(iii) increasing acceleration

(iv) decreasing acceleration

(ii) uniform acceleration

## Q24. The ratio of speed to the magnitude of velocity when the body is moving in one direction is

(i) Less than one

(ii) Greater than one

(iii) Equal to one

(iv) Greater than or equal to one

(iii) Equal to on

## Q25. 180° plane angle is equal to

(i) π/2 radian

(ii) π radian

(iii) 2π radian

(iv) none of these

(ii) π radian

#### Q26. The ratio of the heights from which two bodies are dropped is 3:5 respectively. The ratio of their final velocities is:

(i) 9: 25

(ii) √ 3: √ 5

(iii) 5 : 3

(iv) √5 : √3

(ii) √ 3: √ 5

## Q27. A racing car has a uniform acceleration of 6 m/s². In 10s it will cover:

(i) 300m

(ii) 100m

(iii) 200m

(iv) 350m

(i) 300m

## Q28. Speed of a body in particular direction can be called

(i) acceleration

(ii) displacement

(iii) velocity

(iv) distance

(iii) velocity

## Q29. The slope of distance – time graph gives instantaneous.

(i) acceleration

(ii) speed

(iii) velocity

(iv) Distance covered

(ii) speed

## Q30. If a moving body comes to rest, then its acceleration is-

(i) positive

(ii) both of these depending upon the initial velocity

(iii) negative

(iv) zero

(iii) negative

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