• 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. INVESTIGATING HOW STEEPNESS AFFECTS SPEED

    As the speed increase the resistance builds up. This slowly reduces the acceleration until finally the resistance force will be equal to the accelerating force and then it won't be able to accelerate any more. It will have reached maximum speed or terminal velocity The pattern shown in the graph shows my prediction was correct.

  2. Bouncing Ball Experiment

    This applies to a ball falling in a vacuum. When a ball drops in air there is air resistance to which the ball loses energy in the form of thermal energy. The energy that the ball hits the floor with is kinetic energy.

  1. Viscosity - Comparing the viscosities of different liquids.

    the fluid around it and its equal to the weight of the fluid that has been displaced by the ball bearing.

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

    When an object is realised from a height, it accelerates down the slope due to its Gravitational potential being converted into Kinetic energy (called Energy Conversion), until it reaches a flat surface when it continues to move (First Law of Motion)

  1. 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!

  2. Determining the acceleration due to gravity by using simple pendulum.

    by the following formula L=UT+1/2G T� Where U= initial velocity which is always zero in this case. If U=0 then L=1/2G T� To find G G=2L/ T� TABLE OF RESULTS L, LENGHT (m) T, TIME TAKEN(s) G, ACCELERATION DUE TO GRAVITY (m/s�)

  1. How does the weight of an object affect the friction it has on the ...

    The force needed to overcome static and then dynamic friction will then be noted down, this will be repeated 2 times for the sake of averages, accuracy, and to reduce error. The same experiment will be repeated using different surfaces, and the mass of the block of wood will be altered using various weights.

  2. The Physics of Paper Helicopters

    There are no risks in my experiment. Experiments Varying the height In this experiment I will vary the height from which the helicopter is dropped. The aim of this experiment is to find out how quickly the helicopter achieves its terminal velocity.

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