# Energy Conversation States

Better Essays
TMA03 Covering Block 3

Question 1

(a) An impactor mass of 45 kg is used to represent the weight of child reasonably regarded to be involved in an accident with glass or plastics.

(b) The BS standards gives the manufacturers a clear set of standards that their products need to achieve to be safe and fit for the purpose that they have been designed for. It also gives the purchaser the expectation that the item has reached the standards set down by the BSI and will be a safe for the expected life of the item.

(c) (i) The energy on impact is calculated by using the following equations:

Potential Energy (PE) = mass x gravity x height

This gives the potential energy at the height when the ball is held at the start of the test. This can be used as a check to for the Kinetic energy (KE) equation as the law of energy conversation states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system is a constant. So the PE when the ball is held at height will be the same as the KE just before the impact with the glass.

To calculate the KE use the equation

KE = ½mv2

(ii)

Using the KE equation from question (i)

KE = ½mv2

|u = initial velocity |
|v = final velocity |
|a = acceleration |
|s = distance |

Insert the constants of

Mass = 45kg

To calculate the v2 using the equation

v2 = u2 + 2 x a x s

For test 1

KE = ½mv2

For the v2

v2 = 02 + 2 x 9.8 x 305

Gives 5978

Insert in to KE = ½mv2 to give

KE = ½ x 45 x 5978

To give 134505 = 135J to 3 sf

To check use PE = mgh

45 x 9.8 x 305 = 134505

Round up to 3 sf to give 135 J

## You May Also Find These Documents Helpful

• Satisfactory Essays

voltage source controlled IGBT hvdc schemes? 7.discuss the adv and dis adv of both mercury valves rectifier and thyristor rectifier? Renewable energy systems(res) 1.wat is the need of res? 2.write photo voltaic cell structure and discuss efficiency improvement techniques? 3.what are the diff methods of solar energy concentration? 4.why the solar energy power is not getting properly in society? Suggest techniques to use them by all people of…

• 378 Words
• 2 Pages
Satisfactory Essays
• Good Essays

the still tiny alternative energy market. In a minimum of fifty years fossil fuels, which include petroleum (oil), natural gas, and coal, will all run out. Alternative energy is a renewable and the most productive type of energy for the USA and the world (United States. Department of Energy). Every person on this planet is provided with a dirty and unforgiving energy source, fossil fuels. Fossil fuels destroy and tarnish the once beautiful world. Alternative energy could slowing bring back some…

• 1021 Words
• 5 Pages
Good Essays
• Satisfactory Essays

Energy Debate in the United States Since the 1950’s The United States have consumed energy mainly driven by oil. The demand has almost tripled since then and because of that, the United States have depended on energy supplies from countries that are not reliable and are unstable. The risks and cost of oil rising is a concern for most people to think we should turn to a different energy resource that is cheaper and more reliable than oil. The United States would be better off if we could lead…

• 598 Words
• 3 Pages
Satisfactory Essays
• Good Essays

Renewable energy, a source of energy that holds a significant promise to help reduce the amount of toxins that are by-product of too much energy use and bring a positive impact on our planet that we currently use as our source of energy.These include energy from water(Hydropower), wind, the sun(solar power), geothermal sources, and biomass fuel. In contrast, fuels such as coal, oil, and natural gas are non-renewable,it’s finite and will some day run out completely. One of the most common renewable…

• 482 Words
• 2 Pages
Good Essays
• Good Essays

is renewable energy. Renewable energy includes solar energy, wind power, hydroelectric power, geothermal, biomass, and biofuels. Solar energy comes from sun; wind power obviously comes from wind; hydroelectric power comes from water; geothermal energy comes from heat; biomass fuels come from wood, straw, waste created by animals and humans, and numerous byproducts. As it is, renewable energy can be replenished naturally, and therefore it seems better than fossil fuels and nuclear energy in this perspective…

• 159 Words
• 1 Page
Good Essays
• Satisfactory Essays

Conversation Wan Ting : Hi Car Ley. Seem like times fly and the year-end holidays is coming soon. Do you have any plans for the year-end holiday? Car Ley: I'm planning on sleeping all day, every day! Wan Ting: Oh, come on Car Ley, you must be kidding. Car Ley: Yeah, I'm just pulling your leg. Actually, I'm going to go down to Guizhou Province. Wan Ting: Really? Why would you go to Guizhou? It's not a very popular tourist site. Car Ley: Exactly! It's not very popular, so…

• 343 Words
• 2 Pages
Satisfactory Essays
• Powerful Essays

The State Of The Art Renewable Energy And Technology. Presented by Mirza Abdul Basit Beigh And , Civil Deptt. , SRM University, Kattangulathur, Tamil Nadu Abstract: Energy continues to be a major constraint in achieving socioeconomic growth in developing countries. Recent studies indicate that current patterns of energy consumption and anticipated growth of demand in developing countries risk becoming unsustainable in the long run and hence countries need to focus on sustainable energy strategies…

• 3972 Words
• 16 Pages
Powerful Essays
• Better Essays

Managing Energy Independence in the United States Americans are disgusted with the increasing cost of oil and they no longer want to financially support foreign countries that attack the United States. They are fed up because politicians have been claiming, for over thirty years, that energy independence is within reach, yet little progress has been made toward any real energy independence. Mortimer B. Zuckerman, editor-in-chief of U.S. News and World Report and the publisher and owner of the New…

• 1047 Words
• 5 Pages
Better Essays
• Powerful Essays

Search Algorithm” noted that the energy consumption of Organization of the…

• 1072 Words
• 5 Pages
Powerful Essays
• Powerful Essays

A Healthy Conversation Conversation brings meaning to life. But, what will happen when that conversation has to be focused on ones last living days? Everybody knows that dying is an event in life that no one escapes. We all will be faced with the many challenging questions and decisions that come with death. It may be for ourselves or for someone we love. Some object here, that talking about death can be depressing and possibly shorten terminally ill patient’s lives. However, studies today are showing…

• 3656 Words
• 15 Pages
Powerful Essays