OUR PERFECT PARACHUTE

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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) = 12.16 ÷3 = 4.05

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

POSITION OF STRING ATTACHMENT POINTS CORNER MIDDLE

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)

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

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

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 https://www.youtube.com/w atch?v=t6ufqdGYxjs

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

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