Inertia or inertia is the tendency of all physical objects to resist changes to the state of motion. Numerically, this is represented by the mass of the object. The principle of inertia is one of the foundations of classical physics used to describe the motion of objects and the effect of force imposed on them. The word inertia comes from the Latin word, “iners”, which means inert, or lazy. Isaac Newton defines inertia as:
“vis insita”, or force in matter, is the power to withhold, whereby every object seeks to preserve its present state, whether to be silent, or to move uniformly forward in a straight line.
In general usage one can also use the term “inertia” to refer to “the number of prisoners to the change of pace” (quantified as mass), or sometimes also of momentum, depending on the context. The term “inertia” is better understood as a shorter term for the “inertia principle” as Newton describes in Newton’s law. This law, expressed briefly, says that an object not worn by an outer force (net force equal to zero) moves at a steady pace. In simpler words, an object will continue to move at its current speed without changing direction, until there is a force that causes it to change its speed or direction. It also includes immovable objects (speed = zero), which will remain in a state of silence until there is a force that causes it to move.
In this funny experiment below, showing Newton’s first law of motion. This experiment is very interesting and can be done repeatedly.
Tools and materials
Egg (Can be egg original toy or egg)
The roll of tissue paper
Trays or plastic plates
Pans (just in case the eggs break)
1. Place the glass on a sturdy table.
2. If the original egg is used, fill the glass with water. If not, we can use the empty glass
3. Put a plastic plate or a talam on a glass.
4. Place the roll of toilet paper vertically in the center of a plastic plate or tray directly over the glass
5. Gently place the egg on a roll of paper over a glass
6. One quickly step, tap or pull the plastic plate or talam from the side of the glass.
7. Observe, then we will get the eggs fall directly into the glass.
Why do the eggs fall right into the glass when the roll of paper and the lingering falls sideways?
This can be explained by Sir Isaac Newton’s First Law of Motion, which states that objects in silence and moving objects will continue to move at the same speed (velocity and direction) unless followed by an unbalanced force.
Since the egg does not move at first, it wants to stay that way.
As the tray we take quickly with our hands, the raised ends in turn pull the roll of paper.
When the egg is released, the force of gravity will bring the egg down to the bottom that pulls the egg straight down. The egg then drops right into the glass.
Let’s do the experiment again by using
1. Rolls of paper of different lengths.
2. Various types of peyangga on eggs.