The force of gravity is one of the fundamental interactions that govern the universe and that makes living objects and beings remain fixed on the Earth’s crust, by virtue of a kind of attraction towards the center of the Earth.
People would not be able to walk freely in the world if there were a stronger gravity (in which case we would be too attracted to the ground) or much weaker (in which falls would be like in slow motion and things would become very lighter).
In effect, the way in which life unfolds happens because we live in a gravitational field. This can be said that the fall of something (free of all force) increases its speed at a rate of 9.81 meters per second.
It is important to clarify that the absence of any force implies that nobody prints an additional force on the object, but also imposes limitations linked to other forces, such as the friction force associated with the presence of air.
Indeed, the force of gravity could be verified mathematically only in a vacuum. Due to the characteristics of the Earth, at the poles, the force of gravity is somewhat greater (9.83 m / s 2 ) and in the equatorial zone, it is somewhat less (9.79 m / s 2 ). Jupiter’s gravitational field is much more intense than that of our planet, while that of Mercury is much weaker.
Due to its complexity and difficulty of analysis, the study of gravity consecrated the most important scientists of humanity. Chronologically, Aristotle, Galileo Galilei, Isaac Newton, and Albert Einstein were responsible for the most important contributions in this regard.
Undoubtedly, the last two stand out, the first for providing the relationship between the intensity of attraction with respect to distance and mass, while the second was the one who discovered that matter and space work together, the first distorting the second by means of an intense force field. Both theories were widely supported by mathematical formulations and are considered today to be one of the most important in the history of science.
Examples of the force of gravity
The action of gravity is verified all the time. Here are some examples that show it:
- The simple act of standing upright anywhere is due to gravity.
- The fall of the fruits of the trees.
- The great waterfalls in the falls.
- The translational movement made by the moon around the Earth.
- The force that must be done when riding a bicycle to avoid falling.
- Falling drops of rain.
- All the constructions made by human beings.
- The progressive brake that a body presents when being thrown upwards.
- The movement that a pendulum performs, and any kind of pendulum movement.
- The difficulty of jumping the more weight one has.
- Amusement park attractions.
- The flight of the birds.
- The journey of the clouds in the sky.
- Virtually all sports, particularly throwing into a basketball hoop.
- The need to wear a helmet in outer space, as astronauts are generally seen.
- The firing of any projectile.
- The landing of an airplane (where gravity appears to a much lesser extent than the propelling forces).
- The force that must be done when carrying something heavy in the human body.
- The indications on the scale assume the force of gravity of planet Earth.
- The operation of water cables in cities.