• 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

# Discover the effect that height and weight have on terminal velocity.

Extracts from this document...

Introduction

David Willey        Investigating Falling Cake Cases

Investigation of Falling Cake Cases

Planning and Introduction:

To begin I will explain the term terminal velocity. Terminal velocity is the maximum speed that a given fallen object can obtain.

Terminal velocity is obtained in this way; when an object first starts falling, it accelerates for some while after starting. Eventually the force upwards due to the air flowing over the objects body is equal to the weight acting downwards, and it no longer accelerates.

We can also obtain by using Newton’s 2nd law how there is no acceleration on the falling object. We know that when there is a greater gravitational force moving on a falling object than a frictional force, that it is accelerating. However when both these forces equalise, a constant speed is present. Therefore the total net force on that object is 0. By using Newton’s equation of Force = Mass X Acceleration, and inducing the fact that F = 0, and that mass can not equal zero, that the acceleration must also be zero.

Diagram to Explain Terminal Velocity:

I will vary two factors in this experiment to determine their affect on terminal velocity; these will be the drop height and weight. I will record the time taken for a cake case, or a stack of cake cases, to fall from a certain height and record the results.

Middle

140

1.04

1.16

1.09

1.09

128.4

127.54

180

1.41

1.34

1.48

1.41

127.7

127.54

2 Cake Cases 1.06g

 Distance (CM) Time Of Fall 1secs Time Of Fall 2secs Time Of Fall 3secs Time Of Fall Avsecs Terminal Velocity cm/s Average Terminal Velocity 40 0.25 0.24 0.28 0.25 162.0 165.58 80 046 0.48 0.50 0.48 166.7 165.58 100 0.60 0.59 0.64 0.61 163.9 165.58 140 0.84 0.82 0.84 .0.83 168.6 165.58 180 1.15 0.99 1.10 1.08 166.7 165.58

3 Cake Cases 1.76g

 Distance (CM) Time Of Fall 1secs Time Of Fall 2secs Time Of Fall 3secs Time Of Fall Avsecs Terminal Velocity cm/s Average Terminal Velocity 40 0.20 0.19 0.22 .203 197.0 203.28 80 0.39 0.35 0.45 0.40 200.0 203.28 100 0.49 0.44 0.52 0.48 208.3 203.28 140 0.68 0.71 0.65 0.68 205.9 203.28 180 0.86 0.91 0.91 0.877 205.2 203.28

4 Cake Cases 1.92g

 Distance (CM) Time Of Fall 1secs

Conclusion

To improve this experiment I could have used more scientific equipment, such as a QED Light Gate, so human error would not play such a big a risk as it did using my experiment. By using a QED Light Gate at either end of a selected distance, and dropping the cases through the LED, this would have provided me with extremely accurate results.

If I were to extend my experiment I would use a greater range of cake cases to determine whether the curve continues in the terminal velocity or whether this was just a fluke result. I would also do a smaller change in weight between each case, by doing something like putting a ball of plastascene inside.

If I was to do an additional experiment I would change that drag of the object and the weight as I know that these both affect terminal velocity. I can predict that the drag will affect terminal velocity as the greater the drag the greater the air resistance and so the slower the terminal velocity will be. However I do not know if this is directly proportional, or how it acts with weight so it would be interesting to find out.

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. ## Factors Influencing Resistance of a Wire

3 star(s)

This means that the length of wire and the resistance are very closely related, and directly proportional to each other.

2. ## An Investigation into the terminal velocity of steel ball bearings in Glycerol.

Apparatus The Apparatus was set up as before, but a taller and wider tube was used. As this was not a measuring cylinder, the ruler was used to make out 10 cm intervals. These intervals were, as before, marked with the elastic bands.

1. ## Determine whether the height from which I drop a paper cake case affects how ...

I will keep the same paper cake case throughout and will be careful not to distort the shape as this might have an effect on the air resistance of the case therefore affecting the speed at which the case falls which in turn would affect the time it takes to fall.

2. ## The Study Of the Motion Of A Falling Cake Case With Reference To Terminal ...

believed that heavier objects fell faster than lighter ones. In Newton's first law he stated that... If the forces on mass are balanced, then - If its at rest it stays at rest - If it's moving, it keeps on moving at a constant speed in a straight line.

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

same rate as each other even if one is much heavier than the other is. So if they are dropped from the same height, they will hit the ground at the same time as each other. This is expressed scientifically by saying that acceleration due to gravity on the earth's surface is constant.

2. ## Investigation into the effect of temperature on viscosity

point, but it will take longer than normal, as it has to cover a greater distance, s=v/t. The measuring cylinder used in the experiment is very thin and as such the ball may be affected by friction caused by the closeness of the ball to the sides.

1. ## The effect of the temperature on the viscosity of the syrup.

Once the sphere has reached the end, separate it from the syrup. To do this, hold the magnet by the side of the measuring cylinder so that the sphere becomes attracted to it. Once it becomes attracted, drag the magnet upwards so that the sphere will come up with it as well.

2. ## I am going to find out what factors affect the Terminal Velocity of an ...

My results testing a paper helicopter with wing length of 13 cm has appeared to fall at a slower speed than its previous wing length of 11 cm. This undermines my prediction that when the wing length is increased the speed that it falls at is faster.

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