A horse cannot pull a cart and run in empty space.Why?

Why a horse can not pull a cart and run in empty space?

There are different type of forces in nature.We learnt their effects and applications.Give the exact reasons for the following. Why can't a horse pull a cart in empty space?

We cannot find the woody trunk in monocot plants. Why?

A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A. What is the magnetic field a. outside the toroid b. inside the core of the toroid, and c. in the empty space surrounded by the toroid.

A horse pulls a cart with constant force so that the cart moves with a constant speed. Will the speed of the cart increase,decrease or remain the same if the horse applied more force?

A horse pulls a cart with constant force so that the cart moves with a constant speed. How will you account for the non-acceleration of the cart?

A horse pulls a cart with constant force so that the cart moves with a constant speed. Does it violate Newtons second law of motion?