Subject :NSO Class : Class 8
A chain of length L is placed on a horizontal surface shown in the figure. At any instant, x is the length of chain on rough surface and the remaining portion lies on smooth surface. Initially x = 0. A horizontal force P is applied to the chain as shown in the figure. In a given time interval, x changes from x = 0 to x = L. For chain to move with constant speed,
AThe magnitude of P should increase with time
BThe magnitude of P should decrease with time
CThe magnitude of P should increase first and
then decrease with time
DThe magnitude of P should decrease first and then increase with time.
Ans 1:
Class : Class 9