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  • Identify the correct statements from the following: A. Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket is negative. B. Work done by gr

Identify the correct statements from the following:

A. Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket is negative.

B. Work done by gravitational force in lifting a bucket out of a well by a rope tied to the bucket is negative.

C. Work done by friction on a body sliding down an inclined plane is positive.

D. Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity in zero.

E. Work done by the air resistance on an oscillating pendulum in negative.

Choose the correct answer from the options given below:

Option: 1

B, D and E only


Option: 2

A and C Only


Option: 3

B and D only


Option: 4

B and E only


Answers (1)

best_answer

→ Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket is positive

→ Work done by friction on a body sliding down an inclined plane is negative

→ Work done by a applied force on a body moving on a rough horizontal plane with uniform velocity is positive

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