Acceleration, Class 9 Science

1. There will be total 10 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 decelerating 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

Question 1 of 10

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

Question 2 of 10

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

 Acceleration of an object.

 Retardation of an object.

 Velocity of an object.

 Speed of an object.

Question 3 of 10

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

Question 4 of 10

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.

Question 5 of 10

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

 1:10

 1:1

 1:100

  10:1

Question 6 of 10

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

 ms²

 ms

  ms^-2

  m

Question 7 of 10

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

  positive.

 negative.

 zero.

 all of these depending upon initial velocity.

Question 8 of 10

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

Question 9 of 10

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

 Distance

 Velocity

 Speed

 Displacement

Question 10 of 10

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