Question

help meeeeeee please ​

Answer 1

a) According to Newton's First Law a body remains in its state of motion or rest until an external force acts on it.

But in this case the horse has to continuously exert the force to move the cart, this is because the force of friction is acting against the motion of the cart which us opposing its motion. So the horse has to apply force to overcome this force of friction.

b) Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.