which of the following statements is correct:  A free to move magnetid dipole is placed on a cart or spaceship and attracted towards a mounted/unmoving magnetic dipole, while moving towards the mounted dipole the moving dipole hits a metallic cube and the magnet is stopped, the metallic cube then moves towards the mounted magnet and hitting it, this will: a) Produce movement of the whole spaceship/cart in one direction because the metallic cube acts are mediator and it doesn't violate the Newton's 3rd law; b) No movement in any direction will be produced by the spaceship/cart; c) The spaceship/cart will move in the opposite direction. Explain why.