What is the purpose of chronology?
The purpose of a chronology is to record significant concerns, events or incidents that impact (positively or otherwise) on a child or young person’s wellbeing. A single-agency chronology provides a brief description and summarised account of significant events relevant to a child.
Why do authors use chronological order?
Many writers use chronological order to explain a process, such as how to do something or how something occurs. Explaining a process using chronological order often involves explaining how something develops over time.
What are the disadvantages?
noun. absence or deprivation of advantage or equality. the state or an instance of being in an unfavorable circumstance or condition: to be at a disadvantage. something that puts one in an unfavorable position or condition: His bad temper is a disadvantage.
What are the advantage and disadvantage of online classes?
Read on.
- Online courses require more time than on-campus classes.
- Online courses make it easier to procrastinate.
- Online courses require good time-management skills.
- Online courses may create a sense of isolation.
- Online courses allow you to be more independent.
- Online courses require you to be an active learner.
What are advantages and disadvantages of friction?
Friction produces unnecessary heat leading to the wastage of energy. The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches.
What are the three advantages and disadvantages of friction?
Advantages of friction:
- Friction enables us to walk freely.
- It helps to support ladder against wall.
- It becomes possible to transfer one form of energy to another.
- Objects can be piled up without slipping.
- Breaks of vehicles work due to friction.
- It always resists the motion, so extra energy is required to overcome it.
What are the five disadvantages of friction?
Disadvantages of friction:
- Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.
- Opposes motion, hence more energy is needed to overcome friction.
- Noise production in machines is irritating as well as leads to energy loss.
- Forest fires are caused due to friction between branches of trees.
What is a disadvantage of friction?
Three disadvantages of friction are : Friction produces heat which damages the moving parts of a machine. Friction produces wear and tear on the contacting surfaces. This reduces the life of machine parts, tyres and shoe soles. A lot of energy is wasted in overcoming the friction before an object starts moving.
Why is friction evil?
Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. Hence it is considered as a necessary evil .
Is friction good or evil Explain with examples?
Friction helps us in writting and making drawings. If there were no friction, we would not be able to hold a pen vertically. It is friction that opposes slipping and helps us to hold the pen. also there is friction between our pen and the paper which prevents the pen from slipping on the paper.
Why is friction important in everyday life?
Since friction is a resistance force that slows down or prevents motion, it is necessary in many applications where you might want to hold items or do things and prevent slipping or sliding. If there was no friction, you would not be able to walk, drive a car, or hold objects.
What is the weakest type of friction?
rolling friction
Where is friction not useful?
Friction can also be unhelpful. If you do not lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is transferred to the surroundings, causing heating.
What is the difference between useful and unwanted friction?
Helpful friction People often use friction to slow things down. Unhelpful friction The main problem with friction is that it wears things away so they need to be replaced. The tyres on the racing car will often need to be replaced as friction wears them down. Friction also wears engine parts, so they need replacing.
Which is wasteful friction?
Answer. Though friction is said to be a waste of energy in most of the times, it is really useful at many times in regular life. We need to increase the frictional force while pressing the brakes of a car or a bicycle to stop it at the right time.
Which is the law of friction?
First law of friction: The amount of friction is proportional to the normal force exerted between the surfaces. Second law of friction: Friction does not depend on the area of contact between the object and the surface. Third law of friction: Friction force also depends on the nature of the surfaces in contact.
Which is wasteful friction example?
In any type of vehicle—such as a car, boat or airplane—excess friction means that extra fuel must be used to power the vehicle. In other words, fuel or energy is being wasted because of the friction. Fluid friction or air resistance can greatly reduce the gas mileage in an automobile.
How does friction help in writing?
Answer. while writing u obviously need to hold a pen or pencil. so while holding friction is produced between your fingers and the pencil/pen which thus helps u in writing. friction helps u to get a good grip on the ground so that u can walk properly.
What helps in writing and motion?
it’s energy or force which helps in writing and motion.
How does friction help in walking?
The foot pushes on the ground, and without friction the foot would slide backwards (like walking on ice). Static friction pushes in the direction that prevents your foot from sliding, which results in forward motion. Figure 2. Direction of static friction on a shoe walking forward.
Is friction important in running vehicles?
Friction may slow the car down as it moves along the road, but it also is the force that enables the car to move forward at all. So, it is the force of friction that makes a car accelerate forward and also decelerate to a stop. Friction is also very important when a car goes around a turn.
Can we walk without friction?
Without friction, we wouldn’t be able to walk, run, or drive our cars. On the other hand, friction can also reduce energy efficiency such as the air friction that fights against the motion of vehicles. Consider the good first. In order to move forward, we need to push back on something.