As a seedling's roots begin to grow into the mud, they displace the soil particles, which are moved aside to make room for the new tree.

First Law of Motion

Second Law of Motion

Third Law of Motion

Friction

A seedling falling into the water does so with more force than a leaf, since it has more mass is First Law of Motion. First Law of Motion is discovered by Isaac Newton it is sometimes referred to as the law of inertia. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.