A block (A) of mass 3 kg in contact with a second block (B) of mass 2 kg rests on a frictionless horizontal surface. A horizontal force of 20 N is applied to push the block A. What is the force with which the block A pushes the block B?

A block (A) of mass 3 kg in contact with a second block (B) of mass 2

1.	A block (A) of mass 3 kg in contact with a second block (B) of mass 2 kg rests on a frictionless horizontal surface. A horizontal force of 20 N is applied to push the block A. What is the force with which the block A pushes the block B?
Answer» 4N 6N 8N 10N Solution :The force of 20N producesan acceleration (a) in the two blocks and `a=(F)/(m_(1)+m_(2))= (20)/(3+2)= 4m//s^(2)` `therefore` The force with WHICHTHE block A PUSHES the block B is `f_(1)= m_(2)XX a= 2xx4= 8N`