• 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

# Investigatin a ski jump

Extracts from this document...

Introduction

Scott Jenkins

Investigating a ski-jump

Aim:To investigate how the starting position of a ski jumper affects the horizontal distance travelled in the jump. I will not take air resistance, friction and other various type of energy lost into account, however in practical I have to keep in mind that they do exist and cause variation in my results.

Introduction

Ski jumping is a sport event that involves a steep ramp and a landing zone, where the skier has to travel as far as possible after leaving the ramp horizontally. When the skier is in motion in the air and the range it reaches is what I am investigating. This motion is called the projectile motion and the displacement, velocity and acceleration of the projectile are all vector quantities. Each of these can be placed into vertical and horizontal components. In my experiment, I will create a similar model of the ski jump using a plastic curtain rail as the slope and model the skier as a particle, in this case, a ball bearing.

Diagram                                    This is a diagram of the basic equipment setup

This investigation has much room for expansion on the original above setup. The accuracy can be improved using a combination of more sensitive measuring equipment and a more accurate measuring setup.

Background Knowledge

Speed = Distance                                        Re-arrange

Time

Range = Velocity x Time

X= VT……….Equation 1

To find the range (x), the velocity and time must be found.

m=mass, kg
h=height1, m
H=height2, m
v=velocity, ms
-¹
s=displacement (the range), m
u=initial velocity, ms
-¹
t=time, s
a=g=9.8, ms
-²

Middle

The distance from the edge of the table to the mark made in the sand is measured and then recoded.This is process is then repeated untill all results have been collected.

Safety Precautions

There are few minor risks in doing this experiment, which with careful setting up and appropriate behaviour, can be avoided. These are:

• When bending down to record measurements of the range, it is possible to bas your head coming up. Simply be aware of your surroundings.
• Having a sand pit on the floor can prove to be an obstruction to passers-by and can be a hazard of tripping over. I will make sure there are no obstructions by the landing zone when in practise.
• The ball bearing is heavy enough to cause injury to anyone if hit by it. Keeping distance should prevent this.

Data interpretation

Alongside doing the experiment I will plot a graph. This will allow for any correlations to be spotted early on and then further predictions to be made. It will also allow the investigattion of anomalies. Therefore drawing a graph alongside the experiment allows for greater scientific accuracy and better end results.

Sensitivity

The sensitivity of this experiment is concerned with by the accuracy of the equipment available. For example, a much more accurate measuring device can be used to distinguish to an accuracy of ±0.1mm, but the ruler markings are only accurate themselves to ±1mm. Therefore, this creates a small error and show that to get the best out of the results, the most accurate equipment should be used in all situations.

Accuracy

Conclusion

Ie. At a height of 5cm, the mean result was 31.33cm. However this can actually be smaller or bigger than this value considering the errors in apparatus. The position of the plumbline to mark the the edge of the table will have an estimated ±2mm, having to join 2 meter rulers together will have an estimated ±1mm and judging the landing position of the ball will also have a ±2mm effect on the results. In total the range of values for the results will be ±5mm. Therefor the range of values for 31.33cm would be 30.83cm – 31.83cm.

Percentage error

I will take the maximum result of the range and calculate the percentage error based on the uncertainty values.

% error of range, x, 93.33cm ± 0.5cm

0.5cm ÷ 93.33cm x 100% = 0.53%

The values are vastly small and so are not worth considering.

Improvements

If this investigation were to be repeated, there are a few things I would like to change.

Firstly, I would ensure to take more care that the above factors were fully compramised and minimised.

Furthermore, I would take a much larger range of results to provide a more reliable end result, taking fairness of the experiment into account much more seriously.

Finally, I would use a much more accurate range of apparatus to get the most accuracy in my results. For example, a specialised light gate can be set up at the end of the ramp to dictate the exact speed at which the ball leaves the ramp. This could then be considered with the mass to calculate the kinetic energy and gravitational potential energy and hence the total energy loss.

Bibliography

• Various web pages for research

This student written piece of work is one of many that can be found in our AS and A Level Mechanics & Radioactivity 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 AS and A Level Mechanics & Radioactivity essays

1. ## The acceleration of a ball down various inclines

3 star(s)

AIM The aim of this experiment is to measure the acceleration down an incline, and how that varies with changes in incline. HYPOTHESIS I believe that the rate of acceleration will increase with increases in incline; the control will

2. ## Investigating a ski jump

Equation 3 Equations 2 and 3 can now be substituted into equation 1. Range(x)=Velocity(v) x Time(t) R=V(2gh) x V(2H /g) g cancels out R=V(2h) x V(2H) R=V(4hH)............ Equation 4 Assumptions 1. The friction between the ball and the curtain rail, along with the air resistance are neglible, therefore, will not be accounted for in this experiment.

1. ## Investigating the factors affecting tensile strength of human hair.

Graph 7 shows the stress-strain points for brown hair. Graph 11 shows a modified version of this. The UTS for brown hair is 359.03. Graph 8 shows stress-strain points for blonde hair. Graph 12 shows a modified version of this. The UTS for blonde hair is 125.48. Graph 9 shows the stress-strain for ginger hair.

2. ## Galileo's Rolling Ball experiment

* Handle the ramp carefully when carrying it around. Do not swing it around. * When changing the height, first remove the ramp then adjust the height before returning the ramp to its place. Vertical Height (h) in metres Time (s)

1. ## Physic lab report - study the simple harmonic motion (SHM) of a simple pendulum ...

inaccuracy of the centre of mass marked in the MVA software will result in the shifting up or down of the graphs of displacement, velocity and acceleration against time. (4) The two ends of the half-metre rule are not marked accurately in the MVA software As the two ends of

2. ## Biomechanics of Long Jump

Long jumper Bob Beamon benefited from the slight reduction in gravity and air resistance when he set the world record in Mexico City (short approach - short sprint). In higher altitude there is less air which is bad fro long distance runners as they have less oxygen in the air.

1. ## Helicopter Investigation

With the information from this Law of Gravitation I was able to predict that when there is a force being put onto an object from its natural force then it is called weight as it is pulling it downwards. So when I was asked to do an experiment that was

2. ## Investigating the Inverse Square Law

15.00 1000 180 220 205 201.67 20.00 1000 317 355 345 339.00 25.00 1000 457 469 437 454.33 30.00 1000 543 510 542 531.67 35.00 1000 749 720 735 734.67 From these preliminary results I have decided to time for 10,000 counts at 5 cm from the source, 5000 counts

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