NCERT Class-9 Science Solutions: Chapter 8-Motion Part 2

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Question 7:

Area under a represents a physical quantity which has the unit

Answer: B

Question 8:

Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in Fig. 8.2. Choose the correct statement

  1. Car A is faster than car D.

  2. Car B is the slowest.

  3. Car D is faster than car C.

  4. Car C is the slowest.

Image distance versus time graphs

Image Distance Versus Time Graphs

Image distance versus time graphs

Answer: B

Question 9:

Which of the following figures represents uniform motion of a moving object correctly?

Image state distance - time graph

Image State Distance - Time Graph

Image state distance - time graph

Answer: A

Question 10:

Slope of a velocity – time graph gives

  1. The distance

  2. The displacement

  3. The acceleration

  4. The speed

Answer: C

Image uniform motion of a moving object

Image Uniform Motion of a Moving Object

Image uniform motion of a moving object

Question 11:

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

  1. If the car is moving on straight road

  2. If the car is moving in circular path

  3. The pendulum is moving to and fro

  4. The earth is revolving around the Sun

Answer: A

Image displacement are equal

Image Displacement Are Equal

Image displacement are equal

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