Question: An engine pumps water continuously through a hole. Speed with which water passes through the hole nozzle is 𝑣 and 𝑘 is the mass per unit length of the water jet as it leaves the nozzle. Find the rate at which kinetic energy is being imparted to the water
(A) \dfrac{1}{2}kv^{2}
(B) \dfrac{1}{2}kv^{3}
(C) \dfrac{v^{2}}{2k}
(D) \dfrac{v^{3}}{2k}
Answer: Option (B)
Solution:
