Example, these cars are moving at a constant speed, and then another car crash into it with the same speed and mass, both cars would stop.
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
Example,this monster weighs more than the horse does, then in order for the monster to accelerate, the horse needs to pull with more force than the monster weighs.
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.
Example, when I use my wings, force pushing the opposite side of me pushes me forward.
Newton's third law is: For every action, there is an equal and opposite reaction.