Question

A body falls through a viscous fluid starting from rest towards ground. Then, after a long time, which of the most likely to be correct?

(a) No energy is dissipated by body

(b) Rate of potential energy dissipation is constant

(c) Rate of kinetic energy dissipation is constant

(d) Whole of the energy of body can be dissipated before reaching ground

Answer 1

Answer is : (b) Rate of potential energy dissipation is constant

After a long time, terminal velocity is attained to kinetic energy is constant and only potential energy is dissipated at a constant rate.