• 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
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15
  16. 16
    16
  17. 17
    17
  18. 18
    18
  19. 19
    19
  20. 20
    20
  21. 21
    21
  22. 22
    22
  23. 23
    23
  24. 24
    24
  25. 25
    25
  26. 26
    26

Trolley Speed

Extracts from this document...

Introduction

Factors affecting the speed of a trolleycoae ae" . "r se" . ae . "ae" . "w or". ae . " " . ae . "k inae foae " . ae . ".

Travelling down a ramp

Factors such as; type of surface of ramp, height of ramp, weight/mass of trolley and the gradient or angle of a ramp all affect the speed of a trolley as it travels down a ramp. For instance a trolley may accelerate faster down a ramp on smooth wood rather than on carpet because carpet might provide greater friction for the tyres rather than the smooth wood. Out of all these factors, I am going to pick just 1 factor and alter it 5 different times, doing 3 trials for each time. We have also done some preliminary work on ticker - timers, so in my investigation I am going to expand on the notion of ticker - timers and incorporate my knowledge of ticker - timers in to this investigation.

Aim: To investigate the relationship between the speed of the trolley as it travels down the ramp and the gradient of the ramp.coed ed" . "r se" . ed . "ed" . "w or". ed . " " . ed . "k ined foed " . ed . ":

Hypothesis: I believe that the speed of the trolley travelling down the ramp will increase as the gradient of the ramp is increased. This is because of several different factors.

One of these factors is Potential energy. Potential energy is stored energy possessed by a system as a result of the relative positions of the components of that particular system. In this case, it is a trolley that is held at the top of the ramp, which is above the ground; the trolley and the earth possess a certain amount of potential energy. In this experiment we are focusing on a particular type of potential energy, gravitational energy.

...read more.

Middle

1. After each experiment we cleaned the ramp with a cloth, to make sure that there was

no dirt which could affect the speed of the trolley as it travelled down the ramp.

2. Before we let go off the trolley, I held the ramp so that it would not tilt and therefore

it would not interfere with the speed of the trolley as it travelled down the ramp.

These above factors will also give me more accurate and reliable results. People consider accurate and reliable results as the same kind of result but it is not. Accurate results are results, which are right or correct results. A reliable result means, every time you carry out the experiment they are almost identical results. For example a normal weighing scale might give you reliable results, which gives you the same results each time you do the experiment but they are not as accurate as if you measure with a digital scale. I believe that my results are reliable but not accurate because we had limited resources to carry out the experiment with. Looking at my results they do follow a pattern and a trend. Both the potential and kinetic energy go up as the height increase but more potential than kinetic. The acceleration of the trolley is more than the speed of the trolley and both the kinetic energy and acceleration graphs are almost identical. I have no anomalous results but two inaccurate results, which do not fit in with the rest of the attempts at the same heights. This may have happened because the person timing the trolley may have pressed the digital stopwatch's stop button too late.

...read more.

Conclusion

Height (cm)

Reading 1

Reading 2

Reading 3

Average

Average Speed (cm/s)

12

1.011

1.078

1.007

1.032

67.83

14

0.913

0.905

0.936

0.918

76.25

16

0.818

0.847

0.835

0.833

84.00

            I feel that overall the results were quite accurate. This is can be seen when looking at the graphs, which show a straight line with all of the points apart from one or a few being very close to or on that line.

            The reasons for these few inaccurate results may have been as followed:

The trolley may have been pushed slightly at the beginning therefore giving it an advantage.

The apparatus might not have been set up correctly meaning that results could have been abnormal.

The height of the trolley might not have been measured correctly and therefore, with a greater height, the trolley would have gone faster with a lower time.

            As there were only three anomalies, I can say that the results obtained are reliable to the extent that a clear conclusion can be made from them. I believe that the results obtained do strongly support my conclusion and that further results do not need to be taken apart from the three anomalies which should be repeated.

Further work:

            In addition to the experiment, further work does not need to be done. However to obtain more evidence to support my predictions and possibly to make another prediction, I would also vary another variable. The variable I would choose to vary would add a weight to the trolley pulling it down the ramp. This would speed it up and I would vary the amount of weights. To obtain good results I would drop the weight down onto the floor from a string attached to the trolley with the help of a pulley. With more weights, I would predict that the trolley would go faster down the slope and therefore there would be a lower time.

suhura. Thus, we can say that whilst this represents a progression, in the end we have come no closer to any "real" knowledge.

this coursework was downloaded from Coursework.info. Redistribution prohib

...read more.

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

See related essaysSee related essays

Related GCSE Forces and Motion essays

  1. Physics - how the launch height affects the horizontal distance a ski jumper travels ...

    Therefore it gave the most accurate results. We then tested the medium steel ball at several heights from 10cm to 90cm the height increased by intervals of 20cm. We repeated each launch height four times. This helped us to see how the height would affect the horizontal distance travelled and see if our results were repeatable.

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

    I will put the trolley at its starting position (at the start of the ramp) and then when I am ready I will start the ticker timer and start the trolley down the ramp, and when it reaches the end I will stop the ticker timer.

  1. Investigation is to see how changing the height of a ramp affects the stopping ...

    To conclude my first graph basically shows me that as I increase the height of the ramp, the stopping distance for the car also increases. My graph is an upwards curve through the origin, telling me that the stopping distance of the car is directly proportional to the height of the ramp.

  2. An investigation into factors that effect the braking distance of a trolley

    I predict that as I increase the height of the slope (or the angle between the floor and the ramp), the acceleration will increase, due to a more direct force from gravity caused by less friction on a steeper slope.

  1. Investigation into Friction.

    The percentage error was worked out as follows: 6 - 5.75 = 0.25 0.25 � 6 = 0.042 0.042 x 100 = 4.2 Therefore, 4.2 % is the maximum percentage error for the results for the rough hardboard experiment. This percentage error is not that large, and so this shows

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

    Kinetic energy = 1/2 mv² The potential energy is converted to kinetic energy as an object falls. If the object falls from rest then the change in potential energy is equal to the gain in kinetic energy Mgh = 1/2 mv² Where h is the distance fallen and v is

  1. What affects the Motion of a Trolley on a Runway?

    used was able to work out the actual velocity by itself, so there was no chance of human error. This also meant we could easily take 2 or 3 repeats of each measurement from which to take an average. We started the measurements at 5cm, measuring from the top of

  2. The determination of the acceleration due to gravity at the surface of the earth, ...

    Before moving the pendulum 10? ensure the pendulum hangs vertically at 90? and the edges of the wooden blocks are at 90?. Also measure the length of the pendulum again before starting the swinging of the pendulum to check that the length is correct.

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