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

Parachute Coursework

Extracts from this document...

Introduction

Parachute Coursework Prediction My prediction is that as the weight of plastercine increases the time taken for the parachute to reach the ground will decrease I think this because when the weight has just been dropped it is going slowly, but as it falls through the air it will gain speed until it reaches its terminal velocity. The weight does not change but the A.R gets bigger until it equals out the downwards force of gravity, so when the weight is larger it will have to fall further before the forces equal and it reaches terminal velocity. A.R is equal to the weight of the falling mass being displaced in 1 second What my experiment depends on is how fast the forces can balance. So using a larger weight will mean it will reach its terminal velocity slower. ...read more.

Middle

These are some of the pre-test results:- Length of string (cm) Time (s) Weight (g) 10 2.41 1 10 2.28 1 40 4.23 1 40 4.85 1 We found that with short pieces of string the parachute could not open to its full surface area therefore reducing the amount of A.R which can be placed on it, also with the longer pieces of string the parachute tended to collapse in on its self making the whole thing plummet to the ground. How we made the parachute To make the parachute we made cut four equal lengths of string, and after cutting the bin liner to the correct dimensions attached the string to the 4 corners, we then grouped the string together and tied a knot in the end of them, we would then add one gram of plastercine at a time until the maximum amount was met. ...read more.

Conclusion

much slower rate than at any other time in the experiment, I believe this to be because the weight is the right size for the canopy to equally balance the forces out quickly. To a reasonable extent my results support my prediction apart from the one out of line result which I explained before. The results do show that the greater the weight is on the parachute the longer it takes to reach its terminal velocity making it gain more speed in its freefall before the A.R balances, even though it may have only decreased in time by a fraction of a second each time. Improvements To test my theory further I could try different areas of canopies, a larger range of weights and different lengths of string also I could find a more reliable form of measuring the speed / time taken for the parachute to reach the ground. ...read more.

The above preview is unformatted text

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

Here's what a teacher thought of this essay

4 star(s)

This is a well structured and well written report.
1. The report needs to have an introduction that contains researched information.
2. Several sections are missing from the plan, such as a variables section.
3. The conclusion needs to quote data and explain the patterns.
4. The evaluation is very brief.
****

Marked by teacher Luke Smithen 13/08/2013

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. Marked by a teacher

    The aim of this experiment was to compare the elasticity of arteries and vein ...

    4 star(s)

    When force was applied to the arteries, they stretched a lot more than that of the veins. This is seen by the largest percentage change on application for the arteries, which was 23.68% (9mm difference), compared to the relatively lower 17.14% (6mm difference)

  2. Bouncing Ball Experiment

    in a vacuum all you need to know in order to know how high the ball will bounce to is h1 and CR. CR can be found out by looking at a graph, the gradient, as a percentage of 1 gives the amount of energy conserved and therefore CR can be found without knowing v22 or v12.

  1. INVESTIGATING HOW STEEPNESS AFFECTS SPEED

    I expected that the graphs would look as follows: Speed Steepness (cm) A curved line showed the steepness against the speed. This shows a clear pattern, because it confirms that as the steepness increases so does the speed. When the ball sets off first, it has much more force accelerating it than the resistance slowing it down.

  2. Investigating the factors affecting the speed at which a parachute falls.

    We can make sure our results are reliable by doing the investigation more than once. By doing so, we can obtain more consistent results making the investigation reliable. To drop the parachute from a higher place we will have to stand on a table or a chair, we will have to make sure that we do not fall off!

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

    > Sometimes the toy car changed direction when it went of the ramp and thus completely lost its speed and thus the results weren't noted down, to improve this we could have had a ramp that was curved and thus would have caused less irritation in direction of the toy car.

  2. My investigation is about how the number of paperclips added onto a paper spinner ...

    I believe that this was the reason and the trend for the first four weights were affected by the draft coming from the window as the wind can change from time to time increase and decrease like the results for the first four weights.

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

    This variable will be the height of the ramp. If anything else is varied there can be no connection made between results because you will not be seeing what the effect of height would have. To be able to investigate how height affects stopping distance only the height of the ramp must be changed and the stopping distance measured.

  2. Factors Affecting the Speed of a Car after Freewheeling down a Slope

    A body that has energy due to its position or condition is called the Potential Energy. An object above the surface of the earth is considered to have Gravitational Potential Energy. This is when an object gains energy by being lifted to a height above the ground.

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