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Home » The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:(a) work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket. (b) work done by the gravitational force in the above case
The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:
(a) work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
(b) work done by the gravitational force in the above case
CBSE | Class 11 | NCERT | Physics | Work, Energy, and Power
The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:
(a) work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
(b) work done by the gravitational force in the above case

(a) Work done is positive. It is obvious that both the force and the displacement are in the same direction.

(b) It should be observed that the object’s displacement is upward, but the force of gravity is downward. As a result, the work completed is negative.

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