When a horse pulls a cart, the force which is responsible for the movement of cart is

When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by

when a horse pulls a cart, the force that helps the horse to move forward is the force exerted by

When a horse pulls a wagon, the force that causes the horse to move forward is the force

Why has a horse to pull a cart harder during the first few steps of his motion ?

When a horse pulls a cart, by Newton's III law the cart also pulls the horse with equal and opposite force, then how does the motion of horse, cart and system takes place?

Why does a horse have to pull a cart harder during the first few steps of motion?

A force F is applied to the initially, stationary cart. The variation of force with time is shown in the figure. The speed of cart at t = 5 s is