released from the top of the inclined plane and with the help of the

Phyphox application the angle of inclination of the plane and the

acceleration of the box is measured. The process is repeated by

increasing the angle of inclination and in each case the acceleration

of the box is measured. Although no direct proportionality was found

between the box acceleration and the sine of the tilt angle, a linear

* Magister En Enseñanza De La Fisica,

Universidad Estatal de Milagro

mguerreroz@unemi.edu.ec

* Magister En Enseñanza De La Fisica,

Universidad Estatal de Milagro

jaguirrem1@unemi.edu.ec

https://orcid.org/0000-0003-1245-0925

* Magister En Enseñanza De La Física,

Instituto Superior Tecnológico Babahoyo

laguirre@istb.edu.ec

https://orcid.org/0000-0002-5770-1014

relationship was observed, mainly influenced by the friction between

the two steel surfaces.

inteligente que se encuentra en el interior de una caja con base de

acero y que se desliza sobre un plano inclinado con base de acero.

Se realiza el experimento colocando aceite sobre la superficie de

acero del plano inclinado, luego el teléfono inteligente se coloca

sobre la caja y se suelta desde la parte superior del plano inclinado y

con ayuda de la aplicación Phyphox se mide el ángulo de inclinación

del plano y la aceleración de la caja. Se repite el proceso

aumentando el ángulo de inclinación y en cada caso se mide la

aceleración de la caja. Aunque no se encontró una proporcionalidad

directa entre la aceleración de la caja y el seno del ángulo de

The acceleration of the Earth's gravity is the acceleration that a body

undergoes in interaction with the gravitational field of the planet.

The acceleration of gravity discovered by Galileo Galilei in 1604 and

the formulation of the law of universal gravitation proposed by Sir

Isaac Newton in 1687 provided the basis for what is known as the

acceleration of gravity and its relation to bodies. For Suwanpayak et

al., (2018) at different points on the planet the acceleration of gravity

tends to vary, this is mainly due to the Earth's gravitational field.

For that the experimental determination of the acceleration of gravity

"Galileo does not use experience to find the law, he invokes it only

to verify it, already found by deductive reasoning. One does not err

by overemphasizing this characteristic of the Galilean method ... The

revolutionary methodological innovation introduced by the great

Italian in science ... does not consist in the apotheosis of experience

with contempt for deductive speculation, but, as we have said, in the

masterly synthesis of the triple method of his precursors -

philosophical, mathematical and empirical - in one and indivisible

unity."(Papp, 1961)

Experimental methods must count on the elements that Galileo

for a metal ball falling between a point 1 to a distant point 2, the

difference between these heights is known as distance h. In contrast,

the simple pendulum method takes into consideration the principle

of simple harmonic motion, where a metal ball of mass m, connected

to a string of length L, and using a digital timer to detect the time of

oscillation of the ball of 10 revolutions with five repetitions by

modifying the angle between 0° and 10°. On the other hand, the rigid

axis rotation around a fixed point. In this experiment, a 100 cm long

repetitions, in 5 cm phases, from 5 to 95 cm. In addition, Atwood's

such difference produces a net force which accelerates both hanging

masses, and the time between the distance from a point 1 to a distant

point 2 is taken. (Suwanpayak et al., 2018).

The methods mentioned above have a mathematical analysis

component, which provides experimental values that can be

compared with the theoretical value and determine their uncertainty

and percentage error.

Likewise Martínez Pérez, (2015) mentions about the use of these

mobile devices for the determination of the acceleration of gravity

by means of the simple pendulum:

... ICTs are equipped with sensors such as accelerometers,

gyroscopes, barometers, etc. and, in the last two years, several

researches have shown their feasibility to be used in experiences

inside the physics classroom or in your laboratory, in acoustic,

optical and mechanical phenomena.... (Martínez Pérez, 2015)

The relevance of the aforementioned research highlights the

emphasis needed in science teaching. Teachers must structure and

At present it does not seem to make sense to speak of the

experimental method, but rather of an experimental activity that is

part of a body of knowledge, and includes a diversity of methods.

Science seeks theories that effectively solve problems, which may

be empirical or conceptual; the progress of science seems to occur to

the extent that more problems are solved or eluded. In this sense,

changes are gradual, accepting the coexistence of rival programs,

and although there is a bidirectional relationship between theory and

methods, progress in each field may not be simultaneous (Andrés Z.

et al., 2006)..

timers or stopwatches to use smartphones with sensors that allow

data collection, the latter is the case of this research, which seeks to

determine the acceleration of gravity by placing an object in a plane

tilting based on its resultant force.

The fundamentals of dynamics were set out in Galileo Galilei's book

"Dialogo sopra i due massimi sistemi del mondo" which means

"Dialogue on the two main systems of the world", where the notion

of the concept of inertia was implicit and explained. In addition,

Galileo's experiments with inclined planes had made it possible to

Newton's First Law states "All bodies persevere in their state of rest

or uniform motion in a straight line, unless they are forced to change

that state by an external force".

Newton's second law: "The change of motion is proportional to the

impressed motive force, and is in the same direction as the straight

line in which that force is impressed" (Newton, 1686). (Newton,

1686).

Both laws we apply it to the box moving along the inclined plane of

(!). Therefore, replacing the above in equation 4, we have equation

the experimental model obtained in practice. If we compare it with