1MINUS F*L
A man acting with a force F upon a strecthed spring stands in a railway carriage of a uniformly moving train .the train covered a distance L. What work will be done by the man in a coordinate system related to the earth.
-
UP 0 DOWN 0 0 9
9 Answers
1
i think it should be -FL.
in the earth frame, displacement of the wall AB =L
and force applied on AB by the man =F in opp direction to its displacement.
[corect me if wrong]
62what about the work done by the man on the floor due to friction?
We have discussed this case once before
62What is the acceleration of the man?
Whatis the net force on the man?
What is the net force by the man on the train?
What is ΣF.ds?
11)no acceleration
2) kx to the left, friction to the left, mg down, normal force up.
3) frictional force towards right.
4) -Fl.
106here wat does man acting with force F mean?
is it man provides force F or F force is applied on man??
