Question

Two blocks A and B of mass m_A, and m_B respectively are kept in contact on a frictionless table. The experimenter pushes the block A from behind so that the blocks accelerate. If the block A exerts a force F on the block B, what is the force exerted by the experimenter on A ?

Answer 1

Let, F → contact force between m_A & m_B.
And, f → force exerted by experimenter.