• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Action & Energy - Every day, millions of actions are being performed by you, me and everyone else in this world; aware actions, unaware actions, wanted actions, unwanted actions and many more.

Extracts from this document...

Introduction

Action & Energy Every day, millions of actions are being performed by you, me and everyone else in this world; aware actions, unaware actions, wanted actions, unwanted actions and many more. Every action performed costs energy. This energy is stored in our body and is obtained by eating certain food. Some actions are more common then others. For example: we walk every day, we write every day, we climb up and down stairs every day and many more. One thing younger people have to do every (school) day is lifting up their schoolbag to carry it on their shoulder... The actions involved here are: - the moving down of your arm towards the floor - the getting hold of the bag itself - the picking up of the schoolbag - the rising of the schoolbag to shoulder height - the moving of the one arm through the schoolbag-strap The actual drawings of these actions can be found on page 3. When these schoolbags get lifted up, it costs energy. However, these bags also gain energy; Potential Energy. ...read more.

Middle

energy is being burnt and converted into both kinetic and potential energy. However the potential energy is in the object itself. In this situation, the schoolbag would contain the energy, so when we lift up the schoolbag, chemical energy (in our body) is converted into kinetic (moving) and potential (height) energy. Due to friction, however, some energy is lost. This friction can be air resistance and is lost as heat or sound. In other words, some of the energy used is not used as useful energy, due to friction. When this action is related to the areas of interaction, the most likely area of interaction would be health and social education. There are thousands, if not millions, of people with back problems. There are many reasons for this but one main reason is that they have carried too heavy objects, for too long a time. It has become a serious problem, reaching media in the forms of radio, TV and newspapers, and many medically related people are alarmed by the many kilos of books students have to carry to school and back home every (school) ...read more.

Conclusion

This is mainly due to the fact that we have loads of homework, and all these huge books we need for every class. A possible solution might be that we get less homework and don't have to bring those big, heavy books to class... Further Investigation: If we lift up our schoolbag on average 10 times a day, that will result in 10 * 118 (J) = 1180 (J) When this result is compared to swimming (which has an energy transfer rate of 500 J/s) then lifting up our schoolbag to our shoulders burns just as much energy as nearly 2.4 seconds of swimming. 500 * 2.4 = 1200 (J). An apple is 400 (KJ), or 400000 (J). This is equal to the energy burnt when we lift up our schoolbag 3390 times (nearest whole number) after using the equation: 400000 (J) / 118 (J/bag lifting) = 3389.83 times lifting. So when we lift up a schoolbag 3390 times, we have burnt the energy in 1 apple. All in all, we take in loads of energy, and we burn loads of energy: Keep it balanced!!! Note: in the above essay, friction is ignored. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    The sun's heat can be used to warm water flowing through pipes on a roof. More than 500,000 solar water-heating systems are used in California. 11. Sunlight can also be focussed in a solar thermal system to heat water or other fluids to make steam.

  2. Weed study. Dandelions - descrption and characteristics. Investigation to dandelion distribution.

    I had to choose a sensible area to work in, with sensible measurements. From secondary opinions, it was suggested to use 15m by 15m. This was the right area to use within the two sites. I took out the measuring tape horizontally by 15m and brought it out by 15m vertically.

  1. Why the Body Needs Energy? Every living cell within the ...

    of your fist, it ways round about 1 pound and is located behind and slightly to the left of the breast one this is so the heart can pump blood around the body however the heat pumps about 5 quarters (4.7 litres) of blood everyday or 1800 gallons (6768 litres)

  2. An investigation into the distribution of adult and juvenile limpets on a rocky shoreline.

    Also, if the sample area is a rocky pool or a big rock, I should skip that particular area to the next because there is a larger surface area for the rocky pool and smaller surface area for the

  1. Feeding The Third World

    Selective Breeding involves the transfer of genes between individuals of the same or closely related species. It involves a breeding programme where only organisms with the best features are used, for instance, the largest crops from a yield, which would be picked and their seeds planted.

  2. The World Demand for Power

    As the oil was extracted the pressure in the reservoir that forced the material to the surface would gradually decline. Eventually the pressure will decline so much that the remaining oil will not migrate through the porous rock to the well.

  1. Flat periwinkle Investigation

    Background Reading (Fish JD and Fish S 1996) revealed that flat periwinkles generally preferred sheltered environments, and as the nearest sheltered shore available was at Angle Point. It was decided that data would be collected from this site. Moreover as the investigation relied on a detailed knowledge of the structure of the shoe (with reference to the upper,

  2. African Trypanosomiasis aka African Sleeping Sickness

    Solutions: Main ? Drugs Currently the main method used to treat people with the condition of HAT is drugs. At the first stage the drugs used are not very toxic and are easier to allocate with correct dosages. The earlier HAT is identified, the more probable the cure becomes.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work