hence a work is performed by him which is in direction of force applied
the fact that work =force *displacement
since the boy moves i.e displacement.e. work done
now we say that work done by LADDER ON BOY IS 0
this is due to 0 displacement
but how it can be??
initially it is said that displacement has taken place n now i m saying that there is no displcacement
the real fact is the displacement of the boy is account of his own energy
the ladder does not contribute in any sense the displacement of boy
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