Mechanics ITest 4
SectionD: MatrixMatch Type
Two blocks A and B of mass m and 2m respectively are connected by a massless spring of spring constant K. This system lies over a smooth horizontal surface. At t = 0 the block A has velocity u towards right as shown while the speed of block B is zero, and the length of spring is equal to its natural length at that instant. In each situation of column I, certain statements are given and corresponding results are given in columnII. Match the statements in column I corresponding results in column II.
ColumnI 

(p) 
The velocity of block A 
(q) 
The velocity of block B 
(r) 
The kinetic energy of system of two blocks 
(s) 
The potential energy of spring 
ColumnII 
A. can never be zero 
B. may be zero at certain instants of time 
C. is minimum at maximum compression of spring 
D. is maximum at maximum extension of spring 
Find the correct options from A to D for S.