The friction coefficient between the plank and floor is mu. The man applies, the maximum possible force on the string and the system remains at rest. Then :

The friction coefficient between the plank and floor is mu. The man ap

1.	The friction coefficient between the plank and floor is mu. The man applies, the maximum possible force on the string and the system remains at rest. Then :
Answer» friction FORCE between plank and surface is `(2 mu MG)/(1 +mu)` frictional force on MAN is zero tension in the string is `(2 mu mg)/(1 +mu)` net force on man is zero Answer :a,b,c,d