MCQ Acceleration Chapter 8 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. There will be total 14 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A bus deaccelerating with 4m/s² changes its speed from 60 m s^-1 to a certain value in 5 s. The final speed is:

40 m/s

25 m/s

60 m/s

30 m/s

Your comments:

Question 1 of 14

2. If the upward direction is taken as positive what is the sign of velocity and acceleration when a body falls freely from a height.

positive acceleration and negative velocity

positive acceleration and positive velocity

negative acceleration and positive velocity.

negative acceleration and negative velocity

Your comments:

Question 2 of 14

3. A quantity has a value of -16 m/s². It is the:

Acceleration of an object.

Retardation of an object.

Velocity of an object.

Speed of an object.

Your comments:

Question 3 of 14

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

During downward motion

When the ball comes to rest

During upward motion

When the boy catches the ball

Your comments:

Question 4 of 14

5. Choose the correct option:

distance is a scalar, velocity is a vector , acceleration is a vector.

distance is a vector, velocity is a scalar, acceleration is a vector.

distance is a vector, velocity is a vector, acceleration is a vector.

distance is a scalar, velocity is a vector, acceleration is a scalar.

Your comments:

Question 5 of 14

6. The ratio of C.G.S. to M.K.S. unit of acceleration is:

1:10

1:1

1:100

10:1

Your comments:

Question 6 of 14

7. The S.I. unit of acceleration is:

ms²

ms

ms^-2

m

Your comments:

Question 7 of 14

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

positive.

negative.

zero.

all of these depending upon initial velocity.

Your comments:

Question 8 of 14

9. If the velocity of a body changes uniformly from u to v in time t, the sum of average velocity and acceleration is:

A

B

C

D

Your comments:

Question 9 of 14

10. Acceleration is defined as the rate of change of:

Distance

Velocity

Speed

Displacement

Your comments:

Question 10 of 14

11. Assertion-Different kind of objects take unequal time to cover same distance.

Reason-Every object have their own speed.

a) Both assertion and reason are correct, and reason is the correct explanation for assertion

b) Both assertion and reason are correct, and reason is not the correct explanation for reason.

c) Assertion is true and reason is false.

d) Assertion and reason are false.

Question 11 of 14

12. Assertion : An object may have acceleration even if it is moving with uniform speed.
Reason : An object may be moving with uniform speed but it may be changing its direction of motion.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true

Question 12 of 14

13. Assertion : Motion with uniform velocity is always along a straight line path.
Reason : In uniform velocity, speed is the magnitude of the velocity and is equal to the instantaneous velocity.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true

Question 13 of 14

14. Assertion : The displacement of an object can be either positive, negative or zero.
Reason : Displacement has both the magnitude and direction.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 14 of 14

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