Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure . The coefficient of friction between the floor and the blocks are mu_(s) = mu_(k) = 0.4 . Block A is pushed by an external force F . The value of F can be changed . When the welding between block A and ground breaks , block A will start pressing block B and when welding of B also breaks , block B will start pressing the vertical wall . If F = 20 N ,with how much force does block A presses the block B ?

Two bodies A and B of masses 10 kg and 5 kg are placed very slightly s

1.	Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure . The coefficient of friction between the floor and the blocks are mu_(s) = mu_(k) = 0.4 . Block A is pushed by an external force F . The value of F can be changed . When the welding between block A and ground breaks , block A will start pressing block B and when welding of B also breaks , block B will start pressing the vertical wall . If F = 20 N ,with how much force does block A presses the block B ?
Answer» 10 N 20 N 30 N zero Solution :As `F LT f_(L) (mu N)`