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The work done by a conservative force on a closed curve is zero but why it isn't true for the non conservative force?
Work done by a non conservative force refers to the energy transferred to an object by a force that depends on the path taken by the object, rather than just its starting and ending points. This type of force is also known as a non-conservative force because it does not conserve mechanical energy.
The work done by a non conservative force is calculated by integrating the force over the path taken by the object. This means that the work done is equal to the area under the force vs. distance curve. The work done by a non conservative force can also be calculated by multiplying the magnitude of the force by the distance moved in the direction of the force.
Examples of non conservative forces include friction, air resistance, and tension in a string. These forces depend on the path taken by the object and can cause a change in the object's mechanical energy.
The work done by a non conservative force can either increase or decrease an object's mechanical energy. If the force is acting in the same direction as the object's motion, it will increase the object's mechanical energy. However, if the force is acting in the opposite direction of the object's motion, it will decrease the object's mechanical energy.
Yes, work done by a non conservative force can be negative. This occurs when the force is acting in the opposite direction of the object's motion, resulting in a decrease in the object's mechanical energy. For example, friction is a non conservative force that always does negative work, as it acts in the opposite direction of an object's motion.