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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: An object can have constant speed but variable velocity.
Reason: Speed is a scalar but velocity is a vector quantity.
Assertion: An object can have constant speed but variable velocity.
Reason: Speed is a scalar but velocity is a vector quantity.
- a)If both assertion and reason are true and reason is the correct explanation of assertion.
- b)If both assertion and reason are true but reason is not the correct explanation of assertion.
- c)If assertion is true but reason is false.
- d)If both assertion and reason are false.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Direction: In the following questions, a statement of assertion (A) is...
Assertion: An object can have constant speed but variable velocity.
Reason: Speed is a scalar but velocity is a vector quantity.
Explanation:
Speed and Velocity:
Before understanding the given assertion and reason, it is important to understand the concepts of speed and velocity.
- Speed: Speed is a measure of how fast an object is moving. It is a scalar quantity, which means it only has magnitude (size) and no direction. Speed is calculated by dividing the distance traveled by the time taken.
- Velocity: Velocity is a measure of how fast an object is moving in a specific direction. It is a vector quantity, which means it has both magnitude and direction. Velocity is calculated by dividing the displacement (change in position) by the time taken.
Constant Speed but Variable Velocity:
An object can have constant speed but variable velocity. This can happen when the object is moving in a circular path at a constant speed. In this case, the object is continuously changing its direction, which means its velocity is changing.
Explanation of Assertion and Reason:
- The assertion states that an object can have constant speed but variable velocity. This is true because speed only measures how fast an object is moving and does not take into account the direction of motion. Therefore, as long as the object is moving at a constant speed, its speed will remain constant.
- The reason states that speed is a scalar but velocity is a vector quantity. This is also true because speed only has magnitude and no direction, whereas velocity has both magnitude and direction. Since velocity takes into account the direction of motion, it can vary even when the speed remains constant, as explained in the previous point.
Conclusion:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion. An object can have constant speed but variable velocity because speed is a scalar quantity that only measures magnitude, while velocity is a vector quantity that measures both magnitude and direction.
Reason: Speed is a scalar but velocity is a vector quantity.
Explanation:
Speed and Velocity:
Before understanding the given assertion and reason, it is important to understand the concepts of speed and velocity.
- Speed: Speed is a measure of how fast an object is moving. It is a scalar quantity, which means it only has magnitude (size) and no direction. Speed is calculated by dividing the distance traveled by the time taken.
- Velocity: Velocity is a measure of how fast an object is moving in a specific direction. It is a vector quantity, which means it has both magnitude and direction. Velocity is calculated by dividing the displacement (change in position) by the time taken.
Constant Speed but Variable Velocity:
An object can have constant speed but variable velocity. This can happen when the object is moving in a circular path at a constant speed. In this case, the object is continuously changing its direction, which means its velocity is changing.
Explanation of Assertion and Reason:
- The assertion states that an object can have constant speed but variable velocity. This is true because speed only measures how fast an object is moving and does not take into account the direction of motion. Therefore, as long as the object is moving at a constant speed, its speed will remain constant.
- The reason states that speed is a scalar but velocity is a vector quantity. This is also true because speed only has magnitude and no direction, whereas velocity has both magnitude and direction. Since velocity takes into account the direction of motion, it can vary even when the speed remains constant, as explained in the previous point.
Conclusion:
Both the assertion and reason are true, and the reason is the correct explanation of the assertion. An object can have constant speed but variable velocity because speed is a scalar quantity that only measures magnitude, while velocity is a vector quantity that measures both magnitude and direction.
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Community Answer
Direction: In the following questions, a statement of assertion (A) is...
The correct Answer is A.
Since velocity is a vector quantity, hence as its direction changes keeping magnitude constant, velocity is said to be changed. But for constant speed in equal time interval distance travelled should be equal.
Since velocity is a vector quantity, hence as its direction changes keeping magnitude constant, velocity is said to be changed. But for constant speed in equal time interval distance travelled should be equal.
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer?.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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ample number of questions to practice Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: An object can have constant speed but variable velocity.Reason: Speed is a scalar but velocity is a vector quantity.a)If both assertion and reason are true and reason is the correct explanation of assertion.b)If both assertion and reason are true but reason is not the correct explanation of assertion.c)If assertion is true but reason is false.d)If both assertion and reason are false.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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