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3. A water tanker in the shape of a rectangular parallelepiped weighing 900 kg (when empty) is filled with 5500 kg of water. The tanker is initially at rest on a smooth horizontal surface when water begins to flow out horizontally from a tap at the bottom. Assume that the relative speed (horizontal) with which the water flows out is proportional to the square root of the existing mass of the system. When 2800 Kg of water has come out, the speed of the tanker is found to be 2 m/s. Find its speed when the tanker becomes empty. Neglect all friction. [Ans: 5 m/s]

3. A water tanker in the shape of a rectangular parallelepiped weighing 900 kg (when empty) is filled with
5500 kg of water. The tanker is initially at rest on a smooth horizontal surface when water begins to flow
out horizontally from a tap at the bottom. Assume that the relative speed (horizontal) with which the
water flows out is proportional to the square root of the existing mass of the system. When 2800 Kg of
water has come out, the speed of the tanker is found to be 2 m/s. Find its speed when the tanker
becomes empty. Neglect all friction. [Ans: 5 m/s]

Grade:12th pass

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