• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4

# invetigation:Principle of conservation of energy in terms pe and ke

Extracts from this document...

Introduction

physic investigationTitle : A study of Principle of Conservation of Energy in terms of Gravitational Potential Energy and Kinetic Energy.

Problem: How does the change of gravitational potential energy affects the kinetic energy?

Objective : To investigate the relationship between the gravitational potential energy and kinetic energy.

Variables :

Manipulated variable : The height at which trolley is placed from the reference point

Responding variable : The velocity of the trolley down the ramp

Constant variable : The mass of the trolley.

Hypothesis : The higher the height at which the trolley is placed from the reference point, the higher the velocity of the trolley down the ramp.

Operational definition : 1. Kinetic energy can be determined from the ½ mv², where the maximum velocity of the trolley is determined by ticker tape.

Apparatus and Materials : Ticker timer, ticker tape, trolley, ramp, 12V a.c. power supply, retort stand, retort clamp, bosshead.

Introduction and Theory : According to the Law of Conservation of Energy, the energy in a system may take various form and may be interchanged among the components of the system, but there is never any net gain or net loss of energy by the system as a whole. An object of mass, m, at a height, h, above the ground has potential energy PE=mgh. If the object falls, its potential energy decreases.

Middle

Discussions:From the graph of kinetic energy against gravitational potential energy above, it can be observed that as the height at which the trolley is placed from the reference point increases, the velocity of the trolley down the ramp increases. This indicates that as the gravitational potential energy increases, the kinetic energy also increases. The kinetic energy is linearly proportional to the gravitational potential energy. It correspond with the Law of Conservation of Energy which states that the energy in system may take various forms and may be interchanged among the components of the system, but there is never any net gain or net loss of energy by the system as a whole. By the Law of Conservation of Energy, the sum of the gravitational potential energy and the kinetic energy must remain the same. It follows that the sum of the changes in gravitational potential and kinetic energy must equal to zero.However, in this experiment, the total energy is not equal to zero. The gravitational potential energy and the kinetic energy is not the same in this experiment. This is due to some of the energy is lost or it can be said that some of the energy is transformed to another forms other than from gravitational potential energy to kinetic energy.

Conclusion

Conclusion:In conclusion, the kinetic energy is increasing linearly to the gravitational potential energy. Hence, according to the Principle of Conservation of Energy, the sum of kinetic and potential energy at any point is conserved, provided there is no work done by other external forces acting on it.

References:1) Benn, M., George, G., 2000. Edexcel Physics for AS. London: Hodder Education.2) Akrill, T., Bennet, G., Millar, C. 2000. Practice in Physics. London: Hodder & Stoughton.3) Mee, C., Crundell, M., Arrold, B,. 2008.. International A/AS Level Physcs. London: Hodder Education.4) Cook, B., Marantz, S., 1998. Brief review in Physics. New Jersey: Prentice Hall. 5) Vetterlein, M., 2007. Trolley and falling mass [online]. Avaiable from:http://www.practicalphysics.org/go/Experiment_483.html [Accessed 11 March 2011]..

This student written piece of work is one of many that can be found in our GCSE Forces and Motion 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

# Related GCSE Forces and Motion essays

1. ## Investigate the relationship between GPE (Gravitational Potential Energy) and KE (Kinetic Energy) for a ...

3 star(s)

Time (ms) Average Speed (m/s) Final Speed (m/s) 0.20 0.5 665.00 0.75188 1.50376 0.20 0.5 713.86 0.70042 1.40083 0.20 0.5 758.72 0.65900 1.31801 0.20 0.5 575.50 0.86881 1.73762 0.20 0.5 662.19 0.75507 1.51014 0.20 0.5 574.88 0.86975 1.73949 0.20 0.5 693.07 0.72143 1.44286 0.20 0.5 681.26 0.73393 1.46787 0.20 0.5 657.97 0.75991 1.51983 0.20 0.5 670.39 0.74583 1.49167 Average: 1.51321 Height (m)

2. ## What affects the acceleration of a trolley down a ramp?

the experiment I did to be fairly accurate and to provide enough evidence to support a firm conclusion. I know that my results are accurate because I could compare them to my predicted results to see whether they were right or not.

1. ## Investigating the Factors Which Affect the Motion of a Trolley Down an Inclined Plane

Set the ramp at an incline carefully adjusted to the correct height so that no force will change the speed of the trolley. The heights I will use are: 10cm, 20cm, 30cm, 40cm, 50cm and if time permits we may try 50cm plus if it is safe.

2. ## Investigation on &amp;amp;#145;The Law of Conservation of Energy&amp;amp;#146;

I will work out the velocity of the ramp by using a piece of ticker tape attached to the end of the trolley. The distance between the dots, at the point of the end of the ramp, will allow me to work out the velocity at the end of the run.

1. ## Observing The Law of Conservation of Momentum

This indicates that the collisions are obeying the law of conservation of momentum, but there are slight discrepancies due to errors. Evaluation: It is evident that there were quite a few random and systematic errors, as the magnitudes of the momentum are not the same before and after each collision.

2. ## In this experiment I aim to find out how the force and mass affect ...

If the angle changes then the acceleration of the ball bearing will change automatically. I have chosen to use the angle of 5� because from my preliminary work, which I carried out before the experiment, it seemed like a good angle to use.

1. ## Heat loss

Insulated shades or curtains can help reduce conductive heat loss by isolating the window pane from the room air, the tighter the covering, the greater the insulating effect. Room heat is also lost from windows through radiation, but some may be gained during daylight hours if the window faces the sun.

2. ## report on glass

While still hot the ends of the pod were cut off and the resulting cylinder cut lengthways and laid flat. Other types of sheet glass were crown glass relatively common across Western Europe. With this technique, a glass ball was blown and then opened outwards on the opposite side to the pipe.

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