NEET Physics Work Done by Forces MCQ Question
Which of the following combinations correctly describes the work done by various forces in specific scenarios?
Work done by a man lifting a bucket is positive, work done by gravitational force is negative.
Work done by friction on a body sliding down is positive, work done by applied force on rough surface is negative.
Work done by gravitational force in lifting a bucket is positive, work done by air resistance on a pendulum is positive.
Work done by applied force on moving body with uniform velocity is positive, work done by friction is negative.
Correct Answer
Detailed Explanation
The work done by the man lifting the bucket is positive as he applies force in the direction of displacement, while the work done by gravitational force is negative since it acts in the opposite direction to the displacement.
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