Thank you for reporting, we will resolve it shortly
Q.
Consider the spring-mass system, with the mass submerged in water, as shown in the figure. The phase space diagram for one cycle of this system is
Solution:
In all the given four figures, at mean position the position
coordinate is zero.
At the same time mass is starting from the extreme position
in all four cases. In Fig. (c) and (d), extreme position is more
than the initial extreme position. But due to viscosity
opposite should be the case.
Hence, the answer should be either option (a) or option (b).
Correct answer is (b), because mass starts from positive
extreme position (from uppermost position). Then, it will
move downwards or momentum should be negative.
