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Paper Cake Case Investigation

Extracts from this document...

Introduction

Jade Underdown . 10S1 . JPS . 10h Nov 2002

Paper Cake Case Investigation

Planning

P.2a - The Aim

I am going to drop a paper cake case from a height and record the time it takes to fall to the floor.

P8.a – The Prediction

I predict that paper cake cases that fall from a smaller distance will fall at a quicker time. However, the cake cases that fall a greater distance will have a greater speed.

P8.a – The science behind the prediction

Consulted text book of GCSE Bitesize: Falling

I predict that cases falling shorter distances will fall at a quicker time because if an object falls at 1 metre per second, the same object will fall 2 metres in 2 seconds.  This will be positive correlation on a graph.

Speed is measured by Distance

                          Time

I predict that cases travelling further will have a greater speed.  The force due to gravity of the earth becomes greater as you get closer to the core of the earth.  As an object is falling, the force due to gravity increases, increasing the speed of the falling object.

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Middle

Time3/secs

*Corrected time/secs

Average time/secs

0

0.00

0.00

0.00

-

0.00

40

0.69

0.67

0.67

-

0.68

60

0.72

0.64

0.88*

0.78

0.71

80

0.97

0.91

0.90

-

0.93

100

0.96

1.05

0.99

-

1.00

120

0.93*

1.12

1.13

1.06

1.10

140

1.14

1.19

1.38*

1.29

1.21

160

1.31

1.30

1.45

-

1.35

180

1.98*

1.54

1.56

1.50

1.53

200

1.94*

1.70

1.78

1.75

1.74

Analysing and considering evidence

I have produced a graph to compare the distance the paper cake case fell,

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Conclusion

My prediction that cases that fall a greater distance will have a greater speed is supported when it is considered that point 4 is a greater distance on the x axis than point 3 and the speed of point 4 is a greater time on the y axis than point 3.  

My prediction was that a certain distance, the speed would stay equal.  There is no point in my results that the speed stays the same.  I think this is because the paper cake case has a varied speed throughout its fall.  It starts very slow due to air resistance, and then increases the more it falls due to increased pull of force due to gravity.  The terminal velocity is reached after these two stages and so there is no point that we can identify exactly when the terminal velocity was reached.  If a paper cake case goes through these three stages and I have taken the overall time, I do not know at what point the terminal velocity is reached and so although the results are correct, I cannot be sure this result can find if there is terminal velocity reached.  

/

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