Motion Graphs Class 9 Quiz-2 best question

Motion Graphs Class 9 Quiz-2

Hello, readers ! Welcome to our science quiz for class 9 on the topic ” Motion Graph” chapter-8. Participate in quiz and check your preparation level. Motion Graphs Class 9 Quiz

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Created on July 26, 2022 By pankaj

Motion Graphs Class 9 Quiz-2

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1. What does the area of acceleration-time graph represents?

A. velocity

B. displacement

C. acceleration

D. none of these

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

A. Car A is faster than car D

B. Car D is faster than car C

C. Car C is the slowest

D. Car B is the slowest

The slope of distance-time graph represents the speed.

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3. Which of the following graph represents uniform motion?

A. a

B. b

C. c

D. d

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4. Slope of a velocity-time graph gives

A. the distance                                         

B. the displacement

C. the acceleration                                  

D. the speed

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5. Which one of the following graph represents uniform motion?

A. a

B. b

C. c

D. d

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6.

Observe the given distance-time graph here. Which of the following is correct?

A. The graph represents uniform motion                              

B. The graph represents non-uniform motion                              

C. The graph represents a stationary object

D. The graph represents infinite speed and is not possible.

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7. The velocity-time graph for a body projected vertically upward is

A. ellipse

B. hyperbola

C. parabola

D. straight line

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8. Which one of the following graph represent uniform accelerated motion?

A. a

B. b

C. c

D. d

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9. From the given v-t graph (see figure), it can be inferred that the object is

A. in uniform motion

B. at rest

C. in non-uniform motion

D. moving with uniform acceleration

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10. Area under v-t graph represents a physical quantity which has the unit,

A. m2              

B.   m              

C. m/s2

D. m/s

Your score is

The average score is 60%

Important MCQs from Chapter 8: Motion Topic: Graphs for Class 9.

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9

Created on July 26, 2022 By pankaj

Motion Class 9 Quiz-1

1 / 8

1. The numerical ratio of displacement and distance for a moving object is

A) always more than 1  

B) always less than 1

C) equal or less than 1

D)  always equal to 1

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2. A body executing uniform circular motion has at any instant it's velocity and acceleration are,

A) normal to each other

B) not related to each other

C)  along the same direction

D) in opposite direction

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3. A displacement vector is a

A) change in position

B) scalar

C) velocity

D) distance without direction

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4. A Particle is constrained to move on a straight line path. It returns to the starting point after 10 second. The total distance covered by the particle during this time is 30 m. Which of the following statements about the motion of the particle is correct ?

 

A) (a) displacement of particle zero

B) (d) both (a) and (c) are correct

C) (b) displacement of the particle is 30 m

D) (c) average speed of the particle is 3 m/s

5 / 8

5. A particle is moving in a circular path of radius r. The displacement after half a circle would be

A) zero           

B) 2r               

C)   2 𝛑 r

D)    𝛑 r                

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6. Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is

A) moving with no acceleration

B) at rest

C) in accelerated motion

D) moving with uniform velocity

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

A) (c) The pendulum is moving to and fro

B) (d) The earth is revolving around the sun

C) (b) If the car is moving in circular path

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

The distance moved and magnitude of displacement are equal only in the case of motion along a straight line.

8 / 8

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

A)  uniform acceleration

B) uniform velocity                              

C) decreasing acceleration

D) increasing acceleration

Your score is

The average score is 44%

Important MCQs from Chapter 8: Motion for Class 9.

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Question: Explain motion and rest with the help of examples in details.

Motion and rest are two fundamental concepts in physics that describe the state of an object in terms of its position and movement. Let’s understand both terms with the help of few examples.

Motion:

Motion refers to the change in position of an object with respect to its surroundings or frame of reference and wrt time. Motion is described in terms of change in position, speed and acceleration.

Rest:

Rest refers to the state of an object when position of an object does not change wrt to its surrounding or frame of reference and wrt to time.

It is very important to keep in mind that the concept of rest and motion both is relative. An object may be at rest with respect to one observer but in motion with respect to another observer in same time.

For example:

a. A book placed on a table: When a book is placed on a table and remains stationary, it is at rest with respect to the table. However, it is in motion relative to the Earth, which is rotating and moving around the Sun.

b. A parked car: A car parked on the side of a road is considered to be at rest relative to the road. However, it is in motion relative to the Earth and other celestial bodies.

c. A person sitting on a chair: When a person sits on a chair and does not change their position, they are at rest with respect to the chair. However, they are in motion relative to the Earth’s rotation and its motion around the Sun.

It is important to consider the frame of reference or surroundings when determining whether an object is in motion or at rest. The frame of reference is the point of view from which motion or rest is observed. Different observers may have different frames of reference, leading to different conclusions about whether an object is in motion or at rest.

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