The factors affecting the deflection Essay Example for Free

The factors affecting the deflection Essay The factors affecting the deflection of a cantilever when weights are added onto the end. What I think will happen: I think that as the weights are added to the cantilever, the deflection will increase. I think this will happen because: I think the deflection will increase because gravity will push down on the cantilever and weights while the atoms in the cantilever will be resisting this force: I know that MOMENT = FORCE(N) X DISTANCE This means that the moment of the weights is the distance from the bench (or pivot) multiplied by the number of Newtons attached to the hook. As I know that the moment increases as more weight is added, I can use this to back-up my prediction by stating that more weight (or moment) causes more deflection e. g. I predict that weight is directly proportional to deflection. This could also be likened to a bimetallic strip, which will bend more as it is increasingly heated or cooled. The atoms in a solid are rather like a spring in that if they are stretched, they will try to return to their original position when released (unless stretched beyond their elastic limit). An example is a cube (see next page): When one atom is pulled, any atoms connected to this atom will try to pull each other back into their original shape. The atoms in the cantilever are being stretched so that the beam deflects downwards. The top of the cantilever gets stretched (called tension) and the bottom of the cantilever gets squashed (called compression). A cantilever that has a high cross-section will bend less than one with a low cross-section. This means that as more weight is added to the cantilever, the more tension and compression there will be. I think the atoms at the middle of the cantilever will look like this at first To this when weight is added PLAN To do this experiment, I will need: 1. A wooden meter rule 2. A G-Clamp + small block of wood 3. A Hook 4. 7, 1 Newton weights 5. A small coil of string First fit this equipment up like so: The string is used to attach the hook to the ruler. String is useful for this, as it is thin and can be placed at a measured position with fairly good accuracy. The block of wood goes in-between the G-Clamp and the ruler to stop the pressure damaging the wood. If I were to set-up the ruler without the G-Clamp I could not call it a cantilever, as a cantilever is defined as a projecting structure, fixed in position and direction at one end, and free at the other. In my preliminary experiment I found that there was no way to hook the weights onto the ruler and that using too many weight would snap or split the ruler. I used this information in my primary experiment by using string a certain distance from the bench and also adding no more than 7 Newtons onto my ruler. I have also decided to measure the deflection from the top corner of the ruler, as the bottom corner is 1/2cm away from 0 deflection. I have decided to keep it fair and accurate by changing only one variable. This is mainly due to the time constraint on the practical. I will always use the same ruler, weights and hook. I will take at least 2 readings and use the average in my results. After each reading I will verify it to see if it is near my prediction. If not, I will test it again to check if it was correct. EXPERIMENT 1 As my variable is length, for this experiment I will position my hook at the end to the meter rule: I am leaving 20mm at the end of the ruler so that I can avoid the wear on the ruler that may cause the string to slip. EXPERIMENT 2 Instead of attaching my hook to the end, this time I will position my string 450mm from the bench. Half of what it was before: EXPERIMENT 3 Putting my hook at 225mm would not be a good position as the small results would be harder and less accurate to measure. To stop this I will put the hook at 675mm. This is halfway between my previous positions. RESULTS: My results show that The results show that the bigger the surface area, the greater the amount of oxygen produced in the reaction. As the surface area increased, so to did the oxygen readings e. g. surface area = 4, average = 1. 3, surface area 12 (4+8), average = 2. 5. The 3rd and 4th results increase the surface area less that the 1st to 2nd and so do the averages of them. Also, the oxygen readings fluctuated so taking three recordings and averaging them out was a beneficial idea. My prediction was correct. EVALUATION: The test could have been more reliable if the concentration of acid was kept the same each lesson as this caused higher or lower results depending on which concentration was used. The pieces of potato were overlapping on top of each other in the test tube, which detracted from the accuracy of the result as the experiment was trying to make a correlation between surface area and oxygen produced. A conical flask with a thin mesh just above the bottom would have helped keep as much area exposed as possible. The odd/fluctuating results were mostly due to the acid concentration problem as the overlapping happened every time. I am more certain that my conclusions are correct because I have checked and recorded my results and found no unexplainable anomalies. I could do more research into enzymes and how fast they convert their substrate into the components to enable me to work out the experiment using maths and practical experience.

Knowles Separate Peace Essays: Loss of Innocence -- Separate Peace Es

Loss of Innocence in A Separate Peace    In the human nature, naive ignorance of the world's imperfections eventually yields to the recognition that the world does contain hatred and violence.   John Knowles places his novel A Separate Peace in situations which necessitate this emotional transformation.   The characters become increasingly aware of the nature of the world.   In addition, symbols help show the interrelation of ideas and events as they appear in Gene's subconscious mind.   In this novel, setting, character, and symbols develop the theme of loss of innocence.      Ã‚  Ã‚   Setting expatiates the theme of loss of innocence.   For example, the four major characters in this story are sixteen and seventeen years old, which is the age when teenagers prepare to end their childhood and become adults.   Also, the Devon school, where the story takes place, is a place where boys make the transition to full adulthood, and so this setting shows more clearly the boys' own growth.   Finally, World War II, which in 1942 is raging in Europe, forces these teenage boys to grow up fast; during their seventeenth year they must evaluate everything that the war means to them and decide whether to take an active ... ...nature.   Finally, the tree off which Finny and Gene jump represents the Tree of Knowledge; jumping from the tree is against the rules, and in doing so the boys symbolically accept the loss of their innocence as Adam and Eve did by eating of the forbidden fruit.   Symbols certainly convey the theme of loss of innocence.      Ã‚  Ã‚   In John Knowles' novel A Separate Peace, the theme of loss of innocence is skillfully developed through setting, character, and symbols.   This story simply details a young man's entering the adult world as all children do.   Everyone suffers loss of innocence.   

Ethics in Action: Suspected Impairment Essay

Ethics is defined as the discipline dealing with what is good and bad and with moral duty and obligation. For the physical therapy assistant, it means a standardized conduct geared towards proper and successful patient care. The physical therapist assistant follows a certain standard for ethical conduct to effectively aid physical therapists and to be sensitive and efficient health workers. In this situation, we are dealing with the case of a 35 year old stressed-out woman with an odd behavior, who later on presented with slurring of speech. Slurring of speech can be due to many factors but majority of which are associated with cerebrovascular disease or stroke. In this situation, we are going to apply the American Physical Therapy Association Standards of Ethical Conduct for the Physical Therapist Assistant. The seven standards of ethical conduct seem to show us the values of an ideal physical therapy assistant: respect, trustworthiness, competence, compliance to legislations and responsibility. In analyzing this case, we realize various problems. At the start of the session, the patient was behaving oddly. Although she claims to be euphoric, signs of lethargy still seemed apparent. Later on, she succumbs to this lethargy or generalized body malaise by falling asleep on the mat. Later on, she manifests slurring of speech, which may be due to some problems. The most common cause of slurring of speech is stroke. Other factors that may cause this manifestation are electrolyte imbalance caused by strenuous physical activity, side effects of medications or it is simply due to drowsiness. However we see an imminent danger; she lives far from the clinic where you live and wants to drive all by herself—in her condition. We quickly realize a possible outcome—the danger of meeting accidents on the road in her condition. Recognizing our problem, some of our values as physical therapist assistants are challenged. The situation challenges our respect towards our client. Respect is defined as consideration and the avoidance of interfering with or intruding upon. In this case, we are breaching against the right of the patient to make her own decisions. We seem to not respect this right because we want to have things done our own way and not hers. Thus, this situation does not only concern our patient; it also concerns the physical therapy assistant. In this situation, we are having a patient-health care professional relationship. In turn, this situation challenges us to practice the rest of the 7 standards of ethical conduct. This situation motivates us to practice trustworthiness towards our patient. In this sense, we should show our patient how worthy we are of their trust towards us. We should show them that we are concerned about their health and well-being. We should explain to our patient that we think driving in our condition poses a hazard to her and makes her prone to road accidents. By doing this, we should tell her our real intention—that we are just after her health and safety. Standard 6 of American Physical Therapy Association Standards of Ethical Conduct states that a physical therapy assistant shall make judgments that are commensurate with their educational and legal qualifications as a physical therapist assistant. Judgment per se means â€Å"good sense†, discernment, understanding, the act or mental faculty by which man compares ideas and ascertains the relations of terms and propositions. In this situation, we discern that our patient should not continue driving her own car alone. In our understanding, she is not fit to do it and we are subjecting the patient to harm and injury, as she is prone to accidents in her present condition. Also, it is in our discernment that she should go to the nearest hospital to have her neurological status assessed and her health problems addressed properly. By doing these things, we are fulfilling Standard 7, which states that a physical therapist assistant should protect the public and the profession from unethical, incompetent and illegal acts. In addition to the above values, this situation requires moral sensitivity, moral judgment, moral motivation and moral courage. All these individual processes are needed in our situation. Morality means conformation to the principles of good conduct and virtue. By being morally sensitive, we mean that we are easily affected and moved towards betterment and towards good conduct. In our case, we are moved towards helping our patient and towards helping her attain good health and well being. We are moved towards preventing her from being alone, and we are moved towards accompanying her to the nearest medical hospital so that proper medical attention shall be given. Moral judgment means discernment towards the good of the patient. We discern what is best of her. We anticipate the accidents she will be at risk of and the many problems that may be etiologies of her neurological deficit. Motivation is defined as a process which incites to action and the determination of the choice or movement of will. In that case, moral motivation is also applicable in this situation. We are moved towards helping our patient; our action is for her good health and safety. Moral change is also needed in our situation. It is the process of encountering danger and difficulties with firmness and with intrepidity, for a good and noble cause. We have the courage to act for the well-being of our patient and we go beyond our duties to ensure her safety. This situation does not only involve the physical therapy assistant and the patient, it also involves the family members. In this case, it is proper that we talk to the other family members about the patient’s condition. It is essential to differentiate four terms in this context: the terms problem, dilemma, distress and temptation. A problem is defined as a question proposed for solution, decision or determination; a knotty point requiring clarification. A dilemma means a situation requiring a choice between equally objectionable alternatives; a problem that seems incapable of being resolved satisfactorily. Distress means extreme pain, anguish of the body or mind; that which causes suffering, affliction, calamity, adversity, misery and calamity. The term temptation means an enticement to an act which is evil, immoral or unwise. Yes, our situation is a problem by itself; it needed immediate solution and decision. It is also a dilemma because it poses a choice—whether to let the patient do what she wants or to accompany her to the nearest hospital beyond our duty hours. Our situation is not necessarily a distress but is a prelude to suffering, injury and misery. Certainly, this is not a temptation per se but temptation lurks for every health care professional who counts his or her duty days and does not extend his or her duty in terms of danger or calamity. The dictum for every health care professional is: Love your work. Temptation to do things our way and to be selfish and insensitive to the needs of our patients is a barrier to every health care professional. There are some health care professionals who punch in at 8 AM and go home at 5PM, regardless of what happens to their patients. These are the type of health care professionals who think of their jobs as routine and who takes these jobs as just a job for financial security, but is not their career. A career is something a person puts his or her heart into. As health care professionals, we must think of caring for patients as a career, not as a routine job. This problem, obviously, is not treated with silence. It entices action of the health care professional who cares deeply for his or her patients. In this sense, the situation requires a moral action, brought about by moral sensitivity, judgment, motivation and courage.

The Learning Theories Of The Classroom Setting By Using An...

For teachers to be effective in the classroom, it is important that a range of strategies are used to ensure students learn effectively. The essays purpose is to relate this to the understanding of the main learning theories, especially learnt in weeks six and seven. This will also provide the opportunity to begin applying these theories in the classroom setting ,by using an essay, that works to analyse teaching practices. All the while being critical about one’s beliefs on learning as well as teaching. And using it to consider, the influence of developmental factors on students,to show that it is vital for a teacher to have a variety of strategies so their students learns as effective as possible. Learning for any student, can vary and†¦show more content†¦Direct instruction has been shown to be an effective way of teaching, as it happens to be the method of teaching usually used in the classroom. A teacher may use this by changing the delivery of the lesson where seen appropriate. As well as using a broad range of resources to support their classrooms learning. Features of direct instruction, include explicit as well as well ordered teaching lesson. Some important parts of direct instruction, include ability grouping. Students are placed into groups and then are regrouped on how they are progressing. An importance here is placed on the students pace as well as understanding of what has been taught. An emphasis on pace and efficiency of instruction. This program is meant to accelerate student progress, therefore lessons are designed to bring students to mastery as quick as possible. Frequent assessment, curriculum based assessments help pace students in ability groups and identify students who require additional intervention. Peer delivery also offers teachers new ways to use the curriculum. Inquiry based learning, main goal is to allow the teacher to ask the class questions, as well as pose problems as well as scenarios rather than presenting facts only. The student then will identify questions they may want answered ,to develop a complete understanding of what it taught. Some characteristics of this learning theory include,Show MoreRelatedAn Understanding Of Responsible Thinking Process1593 Words   |  7 Pagesanalytical essay will be discussing and demonstrating an understanding of Responsible Thinking Process (RTP) for school behaviour management. The essay will be including a description of the theoretical background of the selected model. It will also be describing the implementation of the selected model in a â€Å"Whole School† approach and in a classroom setting. Furthermore, the essay will be providing a clear and critical analysis of the potential influence of the selected model on the learning experienceRead MoreTechnology Is Becoming More Accessible And Portable Essay1363 Words   |  6 Pagestechnology in classrooms as innovative tools that can finally democratize the classroom. 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