scholarly journals Practical School Experiments with the Centre of Mass of Bodies

2018 ◽  
Vol 8 (1) ◽  
pp. 97
Author(s):  
Robert Repnik ◽  
Milan Ambrožič
Keyword(s):  
Rigid Body ◽  
Primary School ◽  
Active Participation ◽  
Centre Of Mass ◽  
School Practice ◽  
Logical Sequence ◽  
Open Discussion ◽  
Virtual Point ◽  
Weight Force ◽  
Physics Problems

The concept of the centre of mass of a rigid body as a virtual point where the weight force acts is not easy to understand without a number of supporting school experiments. In school practice, however, experiments onthis topic are often limited to a few of the simplest cases in which a simple flat body, such as a triangle or rectangle, is hung in two or mostly three directions to show where the corresponding plumb lines intersect. Typically, simple wooden bodies are used, on which the plumb lines are already drawn through the centre of mass. However, such experiments can be boring for students and are probably insufficient to illuminate all aspects of the topic. Furthermore, if the experiments are only demonstrated by the teacher rather than being performed in groups, the opportunity to train students’ skills and develop nature-science competences is missed. We therefore prepared and performed a series of group experiments in logical sequence for students of the 8th and 9th grades of primary school, so that their full active participation was invoked. The experience with such an experiment setup with very simple equipment, together with the open discussion of results, increased pupil motivation for physics and perhaps also improved understanding of some physics problems regarding the centre of mass, even for younger students. 

Analysis of Functioning the School Council at Primary School

2012 ◽  
Vol 2 (3) ◽  
pp. 7-31
Author(s):  
Jitka Vidláková
Keyword(s):  
Primary School ◽  
Stages Of Change ◽  
School Council ◽  
School Life ◽  
School Practice ◽  
Comprehensive View ◽  
Student Council

The topic of the contribution is pupil participation in school life. In this framework we will focus on student councils, which represent one of the possible forms of pupil participation. The study analyzes the foundation and the existence of a student council at a selected primary school using a modified Lagerwei’s model of stages of change. In the text we present a comprehensive view on the functioning of student council, as we confront the data relating to its activities obtained from the headmaster, teachers and pupils. The study focuses primarily on researchers dealing with the issue of pupil participation but its focus also brings ideas and inspiration for other professionals and for school practice.

Personality-oriented education as a condition of theoretical thinking development of primary school children

2021 ◽  
Vol 68 (3) ◽  
Author(s):  
Zamira Aijanova ◽  
Keyword(s):  
Primary School ◽  
School Children ◽  
Primary School Children ◽  
School Practice ◽  
Modern School ◽  
Education Environment ◽  
Primary Schoolchildren ◽  
Psychological Education ◽  
Theoretical Thinking

The specificity of personality-oriented education as ecological psychological education environment contributing to the development of primary schoolchildren theoretical thinking is considered in the article. Basic problems connected with such approach inculcation into modern school practice are singled out.

scholarly journals Postural stability in human running with step-down perturbations: an experimental and numerical study

2020 ◽  
Vol 7 (11) ◽  
pp. 200570 ◽  
Author(s):  
Özge Drama ◽  
Johanna Vielemeyer ◽  
Alexander Badri-Spröwitz ◽  
Roy Müller
Keyword(s):  
Postural Stability ◽  
Stance Phase ◽  
Numerical Study ◽  
Centre Of Mass ◽  
Trunk Motion ◽  
Inverted Pendulum Model ◽  
Reaction Forces ◽  
Step Down ◽  
Virtual Point ◽  
Human Running

Postural stability is one of the most crucial elements in bipedal locomotion. Bipeds are dynamically unstable and need to maintain their trunk upright against the rotations induced by the ground reaction forces (GRFs), especially when running. Gait studies report that the GRF vectors focus around a virtual point above the centre of mass (VP A ), while the trunk moves forward in pitch axis during the stance phase of human running. However, a recent simulation study suggests that a virtual point below the centre of mass (VP B ) might be present in human running, because a VP A yields backward trunk rotation during the stance phase. In this work, we perform a gait analysis to investigate the existence and location of the VP in human running at 5 m s −1 , and support our findings numerically using the spring-loaded inverted pendulum model with a trunk. We extend our analysis to include perturbations in terrain height (visible and camouflaged), and investigate the response of the VP mechanism to step-down perturbations both experimentally and numerically. Our experimental results show that the human running gait displays a VP B of ≈−30 cm and a forward trunk motion during the stance phase. The camouflaged step-down perturbations affect the location of the VP B . Our simulation results suggest that the VP B is able to encounter the step-down perturbations and bring the system back to its initial equilibrium state.

scholarly journals Exploring the Effectiveness of Using Big Books in Teaching Primary English in Malaysian Classrooms

2008 ◽  
Author(s):  
Aizan Yaacob ◽  
Annamaria Pinter
Keyword(s):  
Second Language ◽  
Reading Comprehension ◽  
Primary School ◽  
Language Learning ◽  
Literacy Development ◽  
Learning Opportunities ◽  
Active Participation ◽  
Interaction Patterns ◽  
Active Engagement ◽  
Language And Literacy

There are many benefits of using stories for language and literacy development particularly in the areas of vocabulary (Cameron, 2001; Elley, 1989; Penno, Wilkinson & Moore 2002; Hargrave & Senechal, 2000) and reading comprehension. Yet, much is still unknown in second language (L2) contexts. This paper investigates the use of Big Books in primary English in Malaysia where English is taught as an official second language. It draws on transcript data from one teacher from one primary school to illustrate how students’ active participation and interest in language learning emerged as the teacher introduced Big Books instead of the textbook. Our data shows that practice with Big Books changes the interaction patterns and learning opportunities. Students were actively involved and they contributed to the discussions and made spontaneous comments about the stories. Most importantly, the teacher’s elicitation skill is essential in enhancing students’ learning. The Ministry of Education’s hopes to provide more active engagement and to increase students’ interests and motivation through stories were achieved.  

scholarly journals PRACTICAL OPTIONS FOR FORMING AND IMPROVING SOCIAL AND EMOTIONAL SKILLS IN THE TRAINING IN TECHNOLOGY AND ENTREPRENEURSHIP IN THE PRIMARY SCHOOL

2018 ◽  
Vol 15 ◽  
pp. 57-66
Author(s):  
Georgi Ivanov ◽  
Angelina Kalinova
Keyword(s):  
Elementary School ◽  
Primary School ◽  
Entrepreneurship Education ◽  
Emotional Skills ◽  
Research Results ◽  
Social And Emotional ◽  
School Practice ◽  
Social And Emotional Skills ◽  
The Social ◽  
The Subject

Issues related to the formation and improvement of students' social and emotional skills and the reduction of aggression are the subject of a number of studies. Some of them are oriented towards identifying the genesis and essence of these processes, and others - to find solutions in real school practice. In this publication we present research results that gravitate to the second type of research. The object of the study is the processes of formation and improvement of the social and emotional skills of the students and the reduction of the aggression in technology and entrepreneurship education at elementary school and the subject - the development of practical options for formation and improvement of the social and emotional skills of the students reducing aggression. The aim of the study is to develop practical options for shaping and improving social and emotional skills of students and reducing aggression in technology and entrepreneurship education in primary school.

scholarly journals Equimomental Tetrads of a Rigid Body

1930 ◽  
Vol 26 ◽  
pp. x-xi ◽  
Author(s):  
D. M. Y. Sommerville
Keyword(s):  
Rigid Body ◽  
Centre Of Mass ◽  
Equimomental System

A lamina of mass m can be replaced by an equimomental system of three equal particles m placed at the vertices of a maximum inscribed triangle of a momental ellipse for the centre of mass. Similarly any rigid body can be replaced by an equimomental system of four equal particles (cf. Routh, Elementary Rigid Dynamics, 7th ed. (1905), Art. 44 and Note, p. 423).

EVALUATION OF THE EDUCATION-RELATED ACHIEVEMENTS OF PRIMARY SCHOOL PUPILS – BETWEEN SUPPORTING AND EXCLUSION

2019 ◽  
Vol 20 ◽  
pp. 219-231
Author(s):  
Michał Kowalewski
Keyword(s):  
Primary School ◽  
Social Exclusion ◽  
Primary Education ◽  
School Community ◽  
The Other ◽  
School Practice ◽  
Potential Source ◽  
Other Hand ◽  
The One ◽  
Primary School Pupils

It is expected that today’s school shall, on the one hand – to the greatest extent possible, support a pupil in his or her development and education-related activities, on the other hand – prevent exclusion, so easy to occur in today’s, structurally diversified society. The factor which poses a potential source of social exclusion is the evaluation of education-related achievements of pupils, present in the education-related school practice in the form of a grade. The system of evaluating the education-related achievements, in view of the diversity of results, often introduce stereotypical divisions into “better” and “worse” pupils, resulting in school setbacks, implicating negatively perceived competition as well as distorting the relations within the school community. In view of the aforementioned circumstances, the considerations over the evaluation of education-related achievements seem to be well-founded, particularly in the context of primary education of pupils.

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