The answer is 36 kilometers per hour, or 10 meters per second.
Newton's first law is sometimes known as the law of inertia. It is the law that states that an object at rest will stay at rest and an object in motion will stay in motion unless a force acts upon it. For example, if I was working with a wrench in space an it slipped, it would keep on going in one direction with a constant speed unless it hits something. Hope this helps!
because he is carrying more mass and as the ground is muddy his feet goes in due to the pull of gravity
