Question

A cat is in a box, being pulled in a straight line at a constant speed. Which of the following statements is true about the net force acting on the cat? A. It is zero. B. It is equal to the cat’s weight. C. It is less than the cat’s weight but greater than zero. D. It is equal to the magnitude of the force of friction.

Answer 1

Since there is no clue about the surface there arises 2 cases:

1) If the surface is frictionless then option A is correct

2) If we have frictional then external force acts on box to compensate the frictional force so as to give net acceleration zero then option D is correct where frictional force is less than less than weight of cat but greater than zero then option C will also be correct as the case may be. => Both C &D will be the answers.