A block is over a plank . The coefficient of friction between the block and the plank id mu=0.2 Initially both are at rest , suddenly the plank startsmoving with accleration alpha_(0)=4m//s^(2) The displacement of the block in s is (g=10m//s^(2))

A block is over a plank . The coefficient of friction between the bloc

1.	A block is over a plank . The coefficient of friction between the block and the plank id mu=0.2 Initially both are at rest , suddenly the plank startsmoving with accleration alpha_(0)=4m//s^(2) The displacement of the block in s is (g=10m//s^(2))
Answer» 1M relative to GROUND 1 m relative to plank zerorelative toplank 2 m relative to ground Answer :a,B