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Which of the following statements about non-conservative forces is correct?
- a)Non-conservative forces always do positive work.
- b)Non-conservative forces always do negative work.
- c)Non-conservative forces can do positive or negative work depending on the situation.
- d)Non-conservative forces do not do any work.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements about non-conservative forces is cor...
Non-conservative forces are forces that do not depend solely on the initial and final positions of an object. Unlike conservative forces, non-conservative forces can dissipate energy from a system. Let's discuss the given options and determine the correct statement.
a) Non-conservative forces always do positive work.
This statement is incorrect. Non-conservative forces can do positive or negative work depending on the situation. For example, when a frictional force acts on an object, it does negative work by dissipating energy from the system. However, other non-conservative forces, such as air resistance, can do positive work by transferring energy to the system.
b) Non-conservative forces always do negative work.
This statement is incorrect. As mentioned earlier, non-conservative forces can do positive or negative work depending on the situation. The sign of the work done by a non-conservative force depends on the direction of the force and the displacement of the object.
c) Non-conservative forces can do positive or negative work depending on the situation.
This statement is correct. Non-conservative forces can do positive or negative work depending on various factors. The work done by non-conservative forces is determined by the displacement of the object and the direction of the force. For example, if a non-conservative force acts in the same direction as the displacement of the object, it does positive work. On the other hand, if the force acts opposite to the displacement, it does negative work.
d) Non-conservative forces do not do any work.
This statement is incorrect. Non-conservative forces do work on an object, either positive or negative, by transferring or dissipating energy from the system. The work done by non-conservative forces can change the kinetic energy or potential energy of an object.
Therefore, the correct statement is option c) Non-conservative forces can do positive or negative work depending on the situation.
a) Non-conservative forces always do positive work.
This statement is incorrect. Non-conservative forces can do positive or negative work depending on the situation. For example, when a frictional force acts on an object, it does negative work by dissipating energy from the system. However, other non-conservative forces, such as air resistance, can do positive work by transferring energy to the system.
b) Non-conservative forces always do negative work.
This statement is incorrect. As mentioned earlier, non-conservative forces can do positive or negative work depending on the situation. The sign of the work done by a non-conservative force depends on the direction of the force and the displacement of the object.
c) Non-conservative forces can do positive or negative work depending on the situation.
This statement is correct. Non-conservative forces can do positive or negative work depending on various factors. The work done by non-conservative forces is determined by the displacement of the object and the direction of the force. For example, if a non-conservative force acts in the same direction as the displacement of the object, it does positive work. On the other hand, if the force acts opposite to the displacement, it does negative work.
d) Non-conservative forces do not do any work.
This statement is incorrect. Non-conservative forces do work on an object, either positive or negative, by transferring or dissipating energy from the system. The work done by non-conservative forces can change the kinetic energy or potential energy of an object.
Therefore, the correct statement is option c) Non-conservative forces can do positive or negative work depending on the situation.
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Which of the following statements about non-conservative forces is cor...
Non-conservative forces, such as frictional forces or air resistance, can do positive or negative work depending on the situation. For example, when an object is sliding on a rough surface, the frictional force does negative work since it acts in the opposite direction of motion. However, in some cases, non-conservative forces can also do positive work. For instance, when a car's brakes are applied, the frictional force between the brake pads and the wheels does positive work to bring the car to a stop.
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Which of the following statements about non-conservative forces is correct?a)Non-conservative forces always do positive work.b)Non-conservative forces always do negative work.c)Non-conservative forces can do positive or negative work depending on the situation.d)Non-conservative forces do not do any work.Correct answer is option 'C'. Can you explain this answer?
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