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Is work done if you carry a book across the room at a constant velocity?

User Knaak
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Yes because it has been moved from its original point. if had stayed inone spot or had been dropped no work would have been done.
User Peter Petrus
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Answer:

NO

Step-by-step explanation:

As we know by work energy theorem that work done by all forces is given by change in kinetic energy of the system

it is given as


W_(net) = KE_f - KE_i

so here since the kinetic energy is constant for the system

so here change in kinetic energy is zero

hence the net work done must be zero

Here we know that


v_i = v_f

so here we can say that


\Delta KE = 0

so no work is required to move the books at constant speed from one position to other position

User Ramesh Sambu
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