1. OUR PERFECT PARACHUTE

2. WHAT IS PARACHUTE?
 is a device used to slow the motion of an object through an atmosphere  by creating drag.

3. HISTORY OF THE PARACHUTE
OLDEST PARACHUTE DESIGN BY AN ANONYMOUS MANUSCRIPT FROM 1470’S RENAISSANCE ITALY
A VENETIAN INVENTOR FAUSTO VERANZIO MODIFIED DA VINCI’S PARACHUTE SKETCH

4. VARIABLES : Shape of the parachute Material of the parachute
Length of the strings
Layers of parachute
Position of string attachment points

5. Experiment 1 VARIABLE TO BE CHANGED :
OBJECTIVES : To find the difference between square and rectangle parachute and the falling speed
VARIABLE TO BE CHANGED :
SHAPE OF THE PARACHUTE

6. VARIABLES TO BE KEPT CONSTANT
LENGTH OF STRINGS
MASS OF THE LOAD/WEIGHT
LAYERS OF THE PARACHUTE (1)
POSITION OF STRING ATTACHMENT
MATERIAL OF THE PARACHUTE
NUMBER OF STRINGS

7. WHAT TO COMPARE
TIME TAKEN FOR THE PARACHUTE TO REACH THE 3RD FLOOR

8. PROCEDURES
Prepare one plastic sheet at the size of 30×30 cm (square) and 20×30 cm (rectangle)
Prepare 8 strings at the same time (25 cm)
Create one hole on each other’s edge
Attach one string in each hole firmly
Tie the 4 strings of a parachute together, leaving 1 cm for attaching the load
Attach the load to each of the parachute of the string
Then drop the parachute from 5th floor at the same time, at the same level

9. Rectangle= [(3.83) + (4.01) + (4.64)]/3 =4.16
RECORDS
SHAPE
1st try
2nd try
3rd try
AVERAGE TIME FLIGHT
RECTANGLE
3.56
3.73
3.97
4.16
SQUARE
3.83
4.01
4.24
3.75
AVERAGE TIME OF FLIGHT
Square =[ (3.56) + (3.73) + (3.97)]/3= 3.75
Rectangle= [(3.83) + (4.01) + (4.64)]/3 =4.16

10. CONCLUSION
SQUARE is better than RECTANGLE shape for the parachute to test BECAUSE SQUARE shaped has a lower falling speed thus making it more better than the rectangle shaped parachute

11. SHAPE OF THE PARACHUTE 30×30 cm parachute (square
20 ×30 parachute (Rectangle)

12. EXPERIMENT 2
OBJECTIVES : To find the difference between 2 parachutes with different (30 and 20 cm) length of strings and the falling speed
VARIABLE TO BE CHANGED :
LENGTH OF THE STRINGS

13. VARIABLES TO BE KEPT CONSTANT
Shape of the parachute
Mass of the weight /load
Layers of the parachute
Position of strings attachment points
Material of the parachute
Number of strings

14. What to compare?
TIME TAKEN FOR THE PARACHUTE TO REACH THE 3RD FLOOR

15. PROCEDURES We cut 20 cm and 30 cm strings
We put the different strings in each parachute (30 ×30 cm)
Drop the 2 parachutes at the same level and same time
Record the time and test it 3 times

16. RECORDS AVERAGE TIME OF FLIGHT Length of the strings 1st try 2nd try
3rd try
AVERAGE TIME FLIGHT
20 cm
3.48
3.57
3:51
3.52
30cm
4. 25
04.28
4.34
4.25
AVERAGE TIME OF FLIGHT
20 cm( LENGTH OF STRINGS) = [( 3.48) + (3.57) + (3.51)]/3=3.52
30 cm( LENGTH OF STRINGS) = [(4.25) + (4.28) + (4.24) ]/3=4.25

17. CONCLUSION The better parachute is the string with length of 20cm
BECAUSE 20 cm length of strings has a lower speed of falling thus making it better than the 30 cm length of strings. We can say the shorter the better

18. EXPERIMENT 3 POSITION OF STRING ATTACHMENT POINTS
OBJECTIVE :
To find the difference between the position of the strings in the corner and .
in the middle
VARIABLE TO BE CHANGED:
POSITION OF STRING ATTACHMENT POINTS

19. VARIABLES TO BE KEPT CONSTANT
Shape of the parachute
Material of the parachute
Length of the strings
Layers of the parachute(1)
Number of strings
Mass of the load

20. WHAT TO COMPARE?
TIME TAKEN FOR THE PARACHUTE TO REACH THE 3RD FLOOR

21. PROCEDURES We cut 8 (30 cm) strings
We decided to put in the middle of the parachute
And the other parachute, we didn’t change it
Drop the parachute at the same time and at the same level
Record the time and test it 3 times

22. CORNER ( +): (3.48) +(4.22) + (4.68) = 12.38÷3 = 4.12
RECORDS
PARACHUTE
1st try
2nd try
3rd try
AVERAGE TIME FLIGHT
+ (middle)
3.48
4.22
4.68
4.12
x(edges)
3.56
4.34
4.26
4.05
AVERAGE TIME OF FLIGHT
CORNER ( +): (3.48) +(4.22) + (4.68) = 12.38÷3 = 4.12
EDGE (x) : (3.56) + (4.34) + (4.26) = ÷3 = 4.05

23. CONCLUSION
The best parachute to test is the strings that is attached to the corner BECAUSE strings that is attached to the corner has a lower falling speed thus making it more better than the strings that is attached in the middle

24. POSITION OF STRING ATTACHMENT POINTS
CORNER
MIDDLE

25. FOUR FAVORABLE VARIABLES FOR A PARACHUTE
Mass of the load (tape)
Shape of the parachute (square)
Length of the strings (20 cm)
Attachment of the strings (corner)

26. MY PERFECT PARACHUTE IMAGE
30×30 cm parachute
20 cm length of strings Strings attached on the corner

27. GIVE ONE DIFFICULTY THAT YOUR GROUP FACED = LANGUAGE BARRIER=
HOW DID YOU OVERCOME THE CHALLENGES BETWEEN YOUR TEAM?

28. https://www.youtube.com/w atch?v=t6ufqdGYxjs
GIVE ATLEAST ONE POSSIBLE ERROR It went to the wrong floor Exact timing Strings getting tangled Easily damaged Touched the wall
DISCUSSION
atch?v=t6ufqdGYxjs

29. RELIABLE EXPERIMENT The experiment should be objective
The experiment should be quantitative
Accurate experiment
The controlled VARIABLES are kept CONSTANT

30. This is the end of our presentation!
Thank You for Listening!