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Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : When the force retards the motion of a body, the work done is negative.
Reason : Work done depends on angle between force and displacement.
- a)Both assertion and reason are true and reason is the correct explanation of assertion.
- b)Both assertion and reason are true but reason is not the correct explanation of assertion.
- c)Assertion is true but reason is false.
- d)Assertion is false but reason is true.
Correct answer is option 'B'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion is fo...
When the force retards the motion, the force and displacement are in opposite directions to each other. Hence, the work done by the force is negative.
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Direction: In the following questions, a statement of assertion is fo...
Assertion: When the force retards the motion of a body, the work done is negative.
Reason: Work done depends on the angle between force and displacement.
The correct answer is option B: Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
Explanation:
When a force acts on an object, it can either accelerate the object or retard its motion, depending on the direction of the force.
- Work Done: Work is done when a force acts on an object and causes a displacement in the direction of the force applied. Mathematically, work done is given by the formula: Work = Force x Displacement x cos(θ), where θ is the angle between the force and displacement vectors.
- Retardation: When a force acts opposite to the direction of motion, it retards the motion of the body. In this case, the angle between the force and displacement vectors is 180 degrees.
- Negative Work: When the angle between the force and displacement vectors is 180 degrees, the cosine of 180 degrees is -1. Therefore, the work done will be negative. This means that the force is opposing the motion and reducing the energy of the object.
The reason given in the statement is correct, as work done does depend on the angle between the force and displacement vectors. However, it is not the correct explanation for the given assertion.
The correct explanation for the given assertion is that when a force retards the motion of a body, it acts in the direction opposite to the displacement. As a result, the angle between the force and displacement vectors is 180 degrees, which leads to negative work done.
Hence, option B is the correct answer: Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
Reason: Work done depends on the angle between force and displacement.
The correct answer is option B: Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
Explanation:
When a force acts on an object, it can either accelerate the object or retard its motion, depending on the direction of the force.
- Work Done: Work is done when a force acts on an object and causes a displacement in the direction of the force applied. Mathematically, work done is given by the formula: Work = Force x Displacement x cos(θ), where θ is the angle between the force and displacement vectors.
- Retardation: When a force acts opposite to the direction of motion, it retards the motion of the body. In this case, the angle between the force and displacement vectors is 180 degrees.
- Negative Work: When the angle between the force and displacement vectors is 180 degrees, the cosine of 180 degrees is -1. Therefore, the work done will be negative. This means that the force is opposing the motion and reducing the energy of the object.
The reason given in the statement is correct, as work done does depend on the angle between the force and displacement vectors. However, it is not the correct explanation for the given assertion.
The correct explanation for the given assertion is that when a force retards the motion of a body, it acts in the direction opposite to the displacement. As a result, the angle between the force and displacement vectors is 180 degrees, which leads to negative work done.
Hence, option B is the correct answer: Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
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Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. 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 is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. 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 is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. Can you explain this answer?.
Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. 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 is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. 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 is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. 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 is followed by a statement of reason. Mark the correct choice as:Assertion : When the force retards the motion of a body, the work done is negative.Reason : Work done depends on angle between force and displacement.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Assertion is false but reason is true.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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