Question

1. Justify giving proper reasoning whether the work done in the following cases is positive or
negative:
(i) Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
(ii) Work done by gravitational force in lifting a bucket out of a well by means of a rope tied to
the bucket.
(iii) Work done by friction on a body sliding down an inclined plane.
(iv) Work done by an applied force on a body moving on a rough horizontal plane with uniform
velocity.
Work done by resistive force of air on a vibrating pendulum in bringing it to rest.​

Answer 1

Answer:

hey mate your answer is..... 1)+

2)-

3)+

4)+

okay.....................