NEET Physics (general) MCQ Question
Which of the following statements about conservative forces and mechanical energy is correct?
Non-conservative forces, like friction, alter the principle of conservation of energy.
The potential energy associated with a conservative force has a fixed zero point.
Mechanical energy is conserved only in the presence of time-dependent forces.
All forces acting on a system are conservative forces in every scenario.
Correct Answer
Detailed Explanation
Statement A is correct as non-conservative forces, such as friction, indeed modify the principle of conservation of energy. Statement B is incorrect because the zero of potential energy is arbitrary. Statement C is incorrect since mechanical energy can be conserved without time-dependent forces. Statement D is false as not all forces are conservative.
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