Question

An object of mass m is sliding down a hill of
arbitrary shape and after travelling a certain
horizontal path stops because of friction. The work
done that a force must perform to return the object
to its initial position along the same path would be:-

(1) 0
(2) mgh
(4) None of these
(3) 2mgh​

Answer 1

An object of mass m slides down a hill of arbitrary shape and after travelling a certain horizontal path stops because of friction. The total vertical height descended is h. ... The work that a tangerial force must perform to return the object to its initial position along the same path is.

none of these