MULTIPLE CHOICE QUESTIONS:

MULTIPLE CHOICE QUESTIONS:  (MCQ’s)

1. ____________ is defined as the distance travelled by an object in unit time.

(a) Velocity
(b) Acceleration
(c) Speed
(d) Uniform motion

2. Change in the velocity of an object is called ____________.

(a) Acceleration
(b) Speed
(c) Motion
(d) Displacement

3. When an object covers equal distances in equal intervals of time, it is called _____________.

(a) Acceleration
(b) Motion
(c) Speed
(d) Uniform motion

4. The odometer of a car measures  ______ .

(a) Momentum
(b) Velocity
(c) Acceleration
(d) Speed

5.  __________ is the speed of an object moving in definite direction.

(a) Distance
(b) Acceleration
(c) Velocity
(d) Displacement

6. When a body moves in a circular path with uniform speed, its motion is called ____________.

(a) Collision
(b) Uniform circular motion
(c) Velocity
(d) Displacement

7. The shortest path measured from initial position to final position is called _____.

(a) Motion
(b) Displacement
(c) Acceleration
(d) Speed

8. An object is said to be in motion   when its position changes with time and thus motion is ______.

(a) Increased
(b) Accelerated
(c) Decreased
(d) Uniform

9. Motion where object cover unequal distances in equal intervals of time is called ____________.

(a) Displacement
(b) Non-uniform motion
(c) Acceleration
(d) Speed

10. When an object covers equal distances in equal intervals of time it is called as ___.

(a) Acceleration
(b) Speed
(c) Momentum
(d) Uniform motion

11. When the speed of an object decreases, the objects is said to be _______.

(a) Acceleration
(b) Deceleration
(c) Displaced
(d) Momentum

12. ________ is a device fitted in the automobiles to show the distance travelled.

(a)  Speedometer
(b)  Brake liner
(c) Odometer
(d)  Accelerator

13. If velocity changes by unequal amount in equal interval of time is called ______.

(a) Displacement
(b) Non-uniform acceleration
(c) Motion
(d)  Acceleration

14.  Acceleration due to gravity is an example of ____________.

(a) Momentum
(b) Uniform acceleration
(c) Speed
(d) Displacement

15.______ of an object by dividing total distance travelled by an object by the total time taken.

(a) Average speed
(b) Uniform acceleration
(c) Motion
(d) Speed
16. Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 ms-1 It implies that the boy is _______ .
(a) At rest
(b) Moving with no acceleration
(c) In accelerated motion
(d) Moving with uniform velocity

17. Slope of a velocity-time graph gives the ______ .
(a) Distance
(b) Displacement
(c) Acceleration
(d) Speed

 

 18. In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?
(a) If the car is moving on a straight road
(b) If the car is moving in Circular path
(c) The pendulum is moving to and fro
(d) The earth is revolving around the sun.

19. A boy goes from A to B with a velocity of 20 m/min and comes back from B to A with a velocity of 30 m/min. The average velocity of the boy during the whole journey is _____ .
(a) 24 m/min
(b) 25 m/s
(c) Zero
(d) 20 m/min

20. Velocity-time graph of an object is given below. The object has  ______ .
MCQ Questions for Class 9 Science Chapter 8 Motion with Answers 4
(a) Uniform velocity
(b) Uniform speed
(c) Uniform retardation
(d) Variable acceleration

21. According to the given velocity-time graph, the object  ____ .
MCQ Questions for Class 9 Science Chapter 8 Motion with Answers 6
(a) Is moving with uniform velocity
(b) Has some initial velocity
(c) Is moving uniformly with some initial velocity
(d) Is at rest

22. The ratio of speed to the magnitude of velocity when the body is moving in one direction is _____ .
(a) Less than one
(b) Greater than one
(c) Equal to one
(d) Greater than or equal to one

23. Which of the following situations is possible?
(a) An object can have acceleration, but constant velocity.
(b) The velocity of an object may be zero but acceleration is not zero.
(c) Distance and the magnitude of displacement are equal in circular motion.
(d) Average speed and the magnitude of average velocity are always equal in circular motion.

24. Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in the adjacent figure. Choose the correct statement.
MCQ Questions for Class 9 Science Chapter 8 Motion with Answers 2
(a) Car A is faster than car D.
(b) Car B is the slowest.
(c) Car D is faster than car C.
(d) Car C is the slowest.

25. From the given υ – t graph, it can be inferred that the object is ______ .
MCQ Questions for Class 9 Science Chapter 8 Motion with Answers 1
(a) In uniform motion
(b) At rest
(c) In non-uniform motion
(d) Moving with uniform acceleration

26. The total path length travelled by a body in a given interval of time is called ____
(a) Speed
(b) Velocity
(c) Distance
(d) Displacement
27. Velocity is defined as _____per unit time.
(a) Speed
(b) Acceleration
(c) Distance
(d) Displacement

 28. Acceleration is vector quantity and its SI unit is _____
(a) m/s²
(b) m/s
(c) 2m/s²
(d) m/s³

29. A physical quantity that has magnitude as well as ____ is called vector quantity.
(a) Slope

(b) Speed
(c) Direction
(d) None of the above

30. The slope of velocity −time graph gives ____ and the slope of displacement −time graph gives ____
(a) Direction, speed
(b) Acceleration, velocity
(c) Direction, displacement
(d) Speed, displacement

Answers:

1. (c) Speed.
2. (a) Acceleration.
3. (d) Uniform motion
4.  (b) Velocity
5.  (c) Velocity 
6. (b) Uniform Circular Motion
7. (b) Displacement
8. (c) Decreased
9.  (b) Non uniform motion
10. (d) Uniform motion
11. (b) Deceleration
12. (c) Odometer
13. (b) Non uniform Acceleration
14. (b) Uniform Acceleration
15. (a) Average Speed                 
16. (c) In accelerated motion   
17.(c) The acceleration 
18.(a) If the car is moving on a straight road     
19.(a) 24 m/min
20.(c) Uniform retardation   
21.(b) Has some initial velocity         
22.(c) Equal to one   
23.(b) The velocity may be zero….     
24. (b) Car B is the slowest
25.(a) In uniform motion
26.(c) Distance
27.
(d) Displacement
28.(a) m/s²
29.(c) Direction
30.(b) Acceleration, velocity