Work

WORK, ENERGY AND POWER

WORK Work is said to be done whenever a force moves a body through a certain distance in the direction of force. Work done can be defined mathematically as the product of the force and the displacement. It is a scalar quantity & measured in Joules W = F X d ……………………………………….1. W = mgh ……………………………………….2. If a force is applied on a body at an angle Ø to the horizontal Work done to move the body on the horizontal plane = Fcos Ø x d ……………………………..3. Work done to raise the body to an appreciable height = Fcos Ø x d ………………………4. Examples- A boy of mass 50kg runs up a set of steps of total height 3.0m. Find the work done against gravity Solution m = 50kg, h = 3m, g = 10m/s2 Work done = mgh = 50 x 10 x 3 = 1500 Joules Energy Energy… Read More »WORK, ENERGY AND POWER

RIGHT ATTITUDE TO WORK

RIGHT ATTITUDE TO WORK The word attitude can be describe as the feeling and thought an individual has towards someone or something. Every organisation or even family has a code of conduct or practice. E.g. your school. If the employees in an organisation follow its code of practice, we can conclude that such employees have the right attitude to work. Therefore a right attitude to work is a positive state of mind that an individual develops towards his work in an organisation. As it is rightly said that, “what is worth doing at all is worth doing well” and first impression always last longer in the minds of the visitors. The thinking of every worker should therefore be towards how a business will be managed smoothly and survive. The main ingredient to achieve this is what we called right attitude towards work. Right Attitude to Work Right attitude to… Read More »RIGHT ATTITUDE TO WORK

PROBLEMS ENCOUNTERED IN FIELD WORK

PROBLEMS ENCOUNTERED IN FIELD WORK Language Barrier -Inability to communicate due to the interviewer and the respondent not sharing the same language or respondents may be illiterate and thus unable to fill questionnaire. The problems are: Data may not be collected Illiterate people may give wrong answers while attempting questionnaires An interpreter may have to be engages who would be paid which would raise costs. Answers may be distorted by the interpreter Hostility Those being approached to give answers may become harsh due to feeling that their time is being wasted which would cause the field study to be unsuccessful. Dishonest Respondents – Respondents giving wrong information due to suspicion fear of shame or superstition. Bad Weather Raining heavily making it impossible to proceed with data collection and difficulty in movement. Becoming very hot making participants uncomfortable and thus unable to proceed with data collection smoothly. Becoming misty or foggy… Read More »PROBLEMS ENCOUNTERED IN FIELD WORK

FIELD WORK

FIELD WORK Scientific study of geography using the environment as a laboratory or source of information. Types of Field Work Field Excursion -Visiting an area near or far from the school to see geographical phenomena then note down and discuss later in class. Aim a) Reinforce what has been learnt in class b) Gain more geographical knowledge c) Identify and appreciate geographical features d) Identify problems of geographical interest Field Research -Systematic problem solving done by experts in which scientific methods of collecting, recording and analysing data are used. Field Study -Study conducted within a neighbourhood in which one theme is pursued e.g. ‘A study of a local farm’. Importance of Field Work Reinforces what has been learnt in class. Enables one to gain more geographical knowledge. It breaks the monotony of classroom work. It provides learner with practical skills of collecting, recording and analysing data and report writing. Gives… Read More »FIELD WORK

ENERGY, WORK, POWER AND MACHINES

Energy This is the ability to do work. Forms of energy. Chemical energy: – this is found in foods, oils charcoal firewood etc. Mechanical energy:– there are two types; Potential energy – a body possesses potential energy due to its relative position or state Kinetic energy – energy possessed by a body due to its motion i.e. wind, water iii. Wave energy – wave energy may be produced by vibrating objects or particles i.e. light, sound or tidal waves. Electrical energy – this is energy formed by conversion of other forms of energy i.e. generators. Transformation and conservation of energy Any device that facilitates energy transformations is called transducer. Energy can be transformed from one form to another i.e. mechanical – electrical – heat energy. The law of conservation of energy states that “energy cannot be created or destroyed; it can only be transformed from one form to another”. … Read More »ENERGY, WORK, POWER AND MACHINES