NEET Physics Work Done by Forces MCQ Question
Which of the following statements about work done by forces is correct?
The work done by a man lifting a bucket is positive.
The work done by gravitational force when lifting a bucket is positive.
The work done by friction on a body sliding down an incline is positive.
Work done by an applied force on a body moving with uniform velocity is negative.
Correct Answer
Detailed Explanation
The work done by a man lifting a bucket is positive because the force exerted by the man and the displacement of the bucket are in the same direction. In contrast, the work done by gravitational force in this case is negative, as it acts in the opposite direction to the displacement.
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