matrix match

for A ..
work done by N force is zro because of no vertical disp...

work done by friction is not zero as the point of contact is not instantaneously at rest ...

ang mom is conserved abt any point on the surface of M

X coord. of COM is same ... because the frictional force on m will act in opp dir on M so net force 0

for B.....

dir of fric always opposes motion

q r is again true

ang mom is conserved abt any point on the surface of M

t true again

for C..
p r

D

s r

sorry if rong just a rough intution ...... may hav missed out some points

ull be surprised at the answers provided.. all of them have atleast 4 of p,q,r,s,t

for C answers should be p,q ,r,t

the normal force is perpendicular to dislacement.that's why its work should be zero na...

and since there is no friction from ground the x -coordinate of system should remains unchanged....