NEET Physics Work Done by Forces MCQ Question
Which of the following combinations correctly describe the work done by forces on a body?
The work done by an external pulling force on a spring is positive.
The work done by the spring force when it is compressed is positive.
The work done by gravitational force when lifting an object against gravity is negative.
The work done by friction on a sliding body is always negative.
Correct Answer
Detailed Explanation
The work done by an external pulling force on a spring is positive as it overcomes the spring force. In contrast, the work done by the spring force when compressed is negative, and the work done by friction is also negative.
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