A chain of length l lies in a pile on the floor and its mass per unit length linearly increases from `lambda` to `2lambda` from end point A to end point B. If its end point A is raised vertically by applying force at a constant speed `V_(0)`. Then

Options

A. The magnitude of force applied F when y = 3l is `(3)/(2)lambda l g`
B. The magnitude of force applied F when `y=(l)/(2)` is `(5)/(8)lambda lg+(3)/(2)lambda V_(0)^(2)`.
C. The graph between the applied force and y is parabolic, (before loosing the contact)
D. The graph between the applied force and y is straight line. (after loosing the contact)

Answer

A, B, C, D