Question

deduce how energy is related with work when friction is present

Answer 1

friction is a non conservative force

Answer 2

can you give more information, this question seems vague

Answer 3

WHEN FRICTION IS PRESENT :-
\[\large \bf work(friction)+work(any ~force)=\Delta K.E=K.E_f-K.E_i\]

Answer 4

WHEN FRICTION IS ABSENT :-
\[\large \bf work(any~force)=\Delta K.E=K.E_f-K.E_i\]

Answer 5

understood ?? @sabakhan

Answer 6

1) https://www.khanacademy.org/science/physics/work-and-energy/work-and-energy-tutorial/v/work-energy-problem-with-friction
2) http://physics.stackexchange.com/questions/58178/work-done-by-friction