NEET Physics Work Done by Forces MCQ Question
Which of the following statements about work done by forces is correct?
Work done is always a positive scalar quantity regardless of the force direction.
The work done by friction on a moving body is negative.
The sum of the work done by two mutual forces always cancels to zero.
Work done can only be calculated if the nature of the force is known.
Correct Answer
Detailed Explanation
Work done can be positive or negative, as stated in the context, and the work done by friction is specifically mentioned as negative. The other statements contain inaccuracies regarding the nature of work done.
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