[tex]\huge\bold\red{ELLO!!}[/tex]



In which of the following cases is the work done positive, zero or negative -

→ Work done by reporter on a suitcase in listing it from the platform on to his head.

→ Work done by the force of gravity on a suitcase as a suitcase falls down from the Porter's head.

→ Work done by a person on a book held in his hand while walking with uniform speed on a horizontal Road .


Don't Spam...​