1.

The end of a chain of length L and mass per unit length `rho`, which is piled up on a horizontally platform is lifted vertically with a constant velocity u by a variable force F. Find F as a function of height x of the end above platform:A. `rho (gx + 2u^(2))`B. `rho (2 gx + rho u^(2))`C. `rho (gx + u^(2))`D. `rho (u^(2) - gx)`

Answer» Correct Answer - C
Force is rate of change of momentum in chain plus the weight of chain at x
`F = rho xg + rho u^(2)`


Discussion

No Comment Found

Related InterviewSolutions