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Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero?
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Work done by frictional force A) is always negative B) is always posit...
Introduction:
Frictional force is a force that opposes the relative motion or tendency of motion between two surfaces in contact. When an object moves against a surface, the frictional force acts in the opposite direction to the motion. The amount of work done by friction depends on the displacement of the object and the magnitude of the frictional force.
Explanation:
The work done by a force is given by the equation: work = force × displacement × cosine(theta), where theta is the angle between the force and displacement vectors.
1. Work done by friction when object moves in the direction of force:
When an object is moving in the direction of the force of friction, the angle between the force and displacement vectors is 0 degrees. In this case, the work done by friction is positive because the cosine of 0 degrees is 1. The frictional force assists the motion of the object, and energy is transferred to the object.
2. Work done by friction when object moves opposite to the direction of force:
When an object is moving opposite to the direction of the force of friction, the angle between the force and displacement vectors is 180 degrees. In this case, the work done by friction is negative because the cosine of 180 degrees is -1. The frictional force opposes the motion of the object, and energy is transferred from the object.
3. Work done by friction when object doesn't move:
When an object is at rest, the frictional force acts to prevent the object from moving. In this case, the work done by friction is zero because the displacement of the object is zero.
Conclusion:
In conclusion, the work done by the frictional force (friction) can be positive, negative, or zero depending on the direction of the force and displacement of the object. When the object moves in the direction of the force, the work done by friction is positive. When the object moves opposite to the force, the work done by friction is negative. When the object doesn't move, the work done by friction is zero.
Frictional force is a force that opposes the relative motion or tendency of motion between two surfaces in contact. When an object moves against a surface, the frictional force acts in the opposite direction to the motion. The amount of work done by friction depends on the displacement of the object and the magnitude of the frictional force.
Explanation:
The work done by a force is given by the equation: work = force × displacement × cosine(theta), where theta is the angle between the force and displacement vectors.
1. Work done by friction when object moves in the direction of force:
When an object is moving in the direction of the force of friction, the angle between the force and displacement vectors is 0 degrees. In this case, the work done by friction is positive because the cosine of 0 degrees is 1. The frictional force assists the motion of the object, and energy is transferred to the object.
2. Work done by friction when object moves opposite to the direction of force:
When an object is moving opposite to the direction of the force of friction, the angle between the force and displacement vectors is 180 degrees. In this case, the work done by friction is negative because the cosine of 180 degrees is -1. The frictional force opposes the motion of the object, and energy is transferred from the object.
3. Work done by friction when object doesn't move:
When an object is at rest, the frictional force acts to prevent the object from moving. In this case, the work done by friction is zero because the displacement of the object is zero.
Conclusion:
In conclusion, the work done by the frictional force (friction) can be positive, negative, or zero depending on the direction of the force and displacement of the object. When the object moves in the direction of the force, the work done by friction is positive. When the object moves opposite to the force, the work done by friction is negative. When the object doesn't move, the work done by friction is zero.
Community Answer
Work done by frictional force A) is always negative B) is always posit...
May be positive or negative or zero
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Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero?
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Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero?.
Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Work done by frictional force A) is always negative B) is always positive C) is zero D) may be positive, negative or zero?.
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