Max. static friction=coefficient of static friction *normal force =28*.45=12.6kgf
Sand reqd to be added to the bucket for the system to move
=12.6-1.35=11.25kg
Kinetic friction=coefficient of kinetic friction*normal force
=.32*28=8.96kgf
net force acting on the system=force applied -kinetic friction
=12.6-8.96=3.64kgf=3.64*9.81 Newtons
acceleration of system=net force/mass being moved=Newtons/kg=met/sc^2
=3,64*9.81/12.6=2.834met/sec^2
