Chapter 7: Motion Assertion-Reason Questions | science Class 9 CBSE

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Chapter 7: Motion Assertion-Reason Questions | science Class 9 CBSE | ByteNotes.in

Assertion-Reason

Check the statement and reason

A-R

Question 1

Logic Check

Assertion (A): An object is said to be in motion if its position changes with time. Reason (R): Motion is observed only when compared with a reference point.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 2

Logic Check

Assertion (A): The displacement of an object can be zero even if the distance travelled is not zero. Reason (R): Displacement is the shortest distance between initial and final positions of an object.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 3

Logic Check

Assertion (A): Distance is a scalar quantity, while displacement is a vector quantity. Reason (R): Scalar quantities have only magnitude, whereas vector quantities have both magnitude and direction.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 4

Logic Check

Assertion (A): An object is said to be in uniform motion if it covers equal distances in equal intervals of time. Reason (R): Uniform motion results in a constant speed throughout the journey.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 5

Logic Check

Assertion (A): Average speed is the total distance travelled divided by the total time taken. Reason (R): Average speed gives the overall rate of motion irrespective of speed variations during the journey.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 6

Logic Check

Assertion (A): Velocity is a vector quantity while speed is a scalar quantity. Reason (R): Velocity has both magnitude and direction, whereas speed has only magnitude.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 7

Logic Check

Assertion (A): Average velocity is defined as total displacement divided by total time. Reason (R): Average velocity may be zero even when the average speed is not zero.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 8

Logic Check

Assertion (A): Acceleration is the rate of change of velocity. Reason (R): Acceleration can be positive or negative depending on whether the object is speeding up or slowing down.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 9

Logic Check

Assertion (A): An object in uniform circular motion is said to be accelerating. Reason (R): The direction of velocity changes continuously in circular motion even if the speed is constant.

Reasoning Options

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Assertion-Reason

Check the statement and reason

A-R

Question 10

Logic Check

Assertion (A): A distance-time graph for an object in uniform motion is a straight line. Reason (R): In uniform motion, the object covers equal distances in equal intervals of time.

Reasoning Options

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Chapter sections

Chapter 7: Motion | Assertion-Reason

Assertion (A): An object is said to be in motion if its position changes with time. Reason (R): Motion is observed only when compared with a reference point.

Assertion (A): The displacement of an object can be zero even if the distance travelled is not zero. Reason (R): Displacement is the shortest distance between initial and final positions of an object.

Assertion (A): Distance is a scalar quantity, while displacement is a vector quantity. Reason (R): Scalar quantities have only magnitude, whereas vector quantities have both magnitude and direction.

Assertion (A): An object is said to be in uniform motion if it covers equal distances in equal intervals of time. Reason (R): Uniform motion results in a constant speed throughout the journey.

Assertion (A): Average speed is the total distance travelled divided by the total time taken. Reason (R): Average speed gives the overall rate of motion irrespective of speed variations during the journey.

Assertion (A): Velocity is a vector quantity while speed is a scalar quantity. Reason (R): Velocity has both magnitude and direction, whereas speed has only magnitude.

Assertion (A): Average velocity is defined as total displacement divided by total time. Reason (R): Average velocity may be zero even when the average speed is not zero.

Assertion (A): Acceleration is the rate of change of velocity. Reason (R): Acceleration can be positive or negative depending on whether the object is speeding up or slowing down.

Assertion (A): An object in uniform circular motion is said to be accelerating. Reason (R): The direction of velocity changes continuously in circular motion even if the speed is constant.

Assertion (A): A distance-time graph for an object in uniform motion is a straight line. Reason (R): In uniform motion, the object covers equal distances in equal intervals of time.

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