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Nguyễn Thị Xuân Quỳnh, Lương Thuý Hiền, Vũ Thuỳ Linh

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Nguyễn Thị Xuân Quỳnh, Lương Thuý Hiền, Vũ Thuỳ Linh

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Non-fins: 1,5m

Fins: 2m

Explaination:

Rockets can fly due to the principle of action and reaction, as stated in Newton’s third law of motion: for every action, there is an equal and opposite reaction. When a rocket burns its fuel, hot gases are expelled out of the rocket’s engines at high speed. The action of pushing the gases downwards produces an equal and opposite reaction, propelling the rocket upwards.

Stability in rockets is achieved through various means:

• Aerodynamic design: Shaping the rocket and its fins in a way that stabilizes its flight path through the atmosphere.

• Thrust vectoring: Adjusting the direction of the engine’s thrust to control the rocket’s orientation and stability.

• Gyroscopic systems and control surfaces: Using internal gyros and external surfaces (like fins) that can adjust the rocket’s path and orientation during flight.

Distance and height a rocket can reach depend on its design, the amount of fuel it carries, the efficiency of its engines, and the mission profile. For suborbital flights, rockets can travel from a few kilometers to several hundred kilometers high. For orbital or interplanetary missions, rockets can travel hundreds of kilometers to millions or even billions of kilometers away from Earth.

Conclusion:

Rockets are capable of flight through the expulsion of exhaust gases produced by burning fuel, generating thrust that propels them upwards against the force of gravity. The stability of a rocket during flight is carefully managed through its design and control systems. The potential distance and height a rocket can reach are determined by its specifications and the specifics of its mission. Rockets have enabled humanity to explore space, launch satellites, and conduct scientific research beyond the confines of Earth.

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Phùng Vân Anh, Lưu Quang Khải, Phan Hoàng Phương Anh

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Phùng Vân Anh, Lưu Quang Khải, Phan Hoàng Phương Anh

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TRAW ROCKET

LENGTH: 12cm

RADIUS: 0.7cm

MATERIALS NEEDED:

·       A straw

·       A piece of paper

·       Tape

·       Scissors

·       Markers or colored pencils (optional)

INSTRUCTIONS:

1. Take a piece of paper and cut it into a rectangle (12cm/5 inches).

2. Take one of the shorter edges of the paper and fold it about 2 cm (0.8 inches) to create a small flap. This cap will be used to attach the rocket to the straw.

3. Roll the paper tightly around the straw, starting at the opposite end of the lid. Make sure the folding flap is on the outside and secure it with a piece of tape. The rocket should fit tightly on the straw.

4. Cut 4 small triangles to attach to the rocket body to make the fins of rocket

EXPLAINATION:

·       The flight of a straw rocket can be explained by the principles of physics, specifically the concepts of aerodynamics and Newton's third law of motion.

·       Newton's Third Law of Motion: According to Newton's third law, for every action, there is an equal and opposite reaction. When you blow into the straw, you create a force by expelling air out of the straw. As a result, the air exerts an equal and opposite reaction force on the rocket, propelling it forward.

·       Aerodynamics: The shape and design of the straw rocket contribute to its flight. The pointed tip of the rocket reduces air resistance, allowing it to move through the air more easily. This streamlined shape minimizes drag, which is the force that opposes the motion of an object through a fluid, such as air.

·       As you blow air through the straw, it creates high pressure inside the straw and low pressure outside. This pressure difference causes the rocket to experience a net force in the direction of lower pressure (from high pressure to low pressure). This force, combined with the streamlined shape of the rocket, allows it to accelerate forward.

·       Additionally, the fins (if you have added them) can help stabilize the rocket during flight. They provide stability by counteracting any rotational forces that may be present, keeping the rocket pointed in the desired direction.

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STRAW ROCKET :

Length: 12cm

Radius: 1cm

EXPLANIN:

The science behind paper rockets with straws involves creating thrust by blowing air through the straw. When air is forced out of the straw by blowing into it, it generates thrust that propels the paper rocket forward. This simple yet engaging experiment demonstrates basic principles of aerodynamics and propulsion. The design of the rocket, including features like paper tail fins, helps stabilize and guide the rocket during flight. By adjusting the design, such as modifying the rocket's shape or weight distribution, one can explore how these factors affect the rocket's flight performance.

TRAVEL:

no fins: 2-4m

with fins: 5-7m

high: 2m

Explain: Fins affect the stability of a rocket by providing aerodynamic control surfaces that help the rocket maintain its direction during flight. The stability of a rocket refers to its ability to fly through the air without wobbling or tumbling. Fins are crucial for maintaining this stability, as they generate lift and drag forces that counteract the forces acting on the rocket, such as gravity and air resistance. The size, shape, and number of fins can significantly influence the rocket's performance and stability.

Conclusion:In conclusion, the science behind paper rockets with straws involves creating thrust by blowing air through the straw, which propels the paper rocket forward. The design of the rocket, including features like paper tail fins, helps stabilize and guide the rocket during flight. Rockets have fins primarily for stability during flight, as they provide aerodynamic control surfaces that help the rocket maintain its direction. The size, shape, and number of fins can significantly influence the rocket's stability, with larger, narrower, and more fins generally providing more lift and drag, making the rocket more stable. By carefully designing and adjusting these characteristics, engineers can optimize the rocket's performance and ensure that it maintains its intended trajectory.

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Phạm Thị Kiều Linh - Vũ Phương Anh - Hoàng Bảo Phương Linh

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Phạm Thị Kiều Linh - Vũ Phương Anh - Hoàng Bảo Phương Linh

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Đinh Doãn Nhật Nam, Lương Khánh Huyền, Huỳnh Lê Như Lý

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Đinh Doãn Nhật Nam, Lương Khánh Huyền, Huỳnh Lê Như Lý

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Non-fins: 4,2m

Fins: 5,4m

EXPLAINATION:

A rocket made from paper and straw propelled by human blowing can fly due to the principle of action and reaction, as described by Newton's third law of motion.

Propulsion: By blowing air into the rocket through a straw, a person creates high-pressure air inside, which is then expelled through the rocket's open end, generating a force that propels the rocket upwards.

Stability: The rocket's stability hinges on its design and aerodynamics. Without advanced stabilization features like fins, it relies on the direction and force of the airflow from the person blowing into the straw, which can lead to instability and unpredictable flight paths.

Height: Factors like the force of the person's breath, the rocket's design, and environmental conditions determine how high the rocket can ascend. Typically, it reaches moderate altitudes compared to rockets with more powerful propulsion systems.

Distance: Horizontal travel distance is influenced by factors such as initial propulsion force, aerodynamics, and wind conditions. Since it's propelled by human breath, its range may be limited compared to rockets with dedicated propulsion systems.

CONCLUSION:

In conclusion, while a paper and straw rocket propelled by human blowing can achieve flight, its stability, altitude, and distance capabilities are relatively modest compared to more advanced rocket designs. Nonetheless, it can serve as an engaging and educational tool for demonstrating fundamental principles of physics and propulsion.

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Đỗ Xuân Quân, Hoàng Thùy Linh, Nguyễn Tuệ Hải 

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Đỗ Xuân Quân, Hoàng Thùy Linh, Nguyễn Tuệ Hải 

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Rocket

I. Design

1. Materials

Papers

Scissors

Tape

Straw

2. How to make

Use a straw to roll the paper into a tube and secure it with tape.

Cut a piece of paper 5cm long and 2cm wide, then roll it into a cone shape, and attach it to one end of the tube.

Cut 4 pieces of paper and fold them into equal triangles, then secure them to the other end.

3. Process

Insert the straw into the rocket's intestines, blow and measure the results.

II.  Explain

When pushing air from the mouth of the straw through the straw, according to Newton's law, there is an impact force from the air (action), and at the same time there is a relatively equal and opposite reaction force (reaction force).

When pushing air out of the mouth of the straw, the force from the air moves forward.

According to Newton's law, to maintain balance, there is a relatively opposite reaction force. This reaction force is created by the air escaping from the mouth of the straw and creates a thrust in the opposite direction of the air's movement.

The reaction force creates a thrust on the flying paper rocket, causing it to rise into the air.

III. Conclusion

No fins: ~2.4m

Fins: ~3.6m

In total, pushing air from the nozzle creates an impact force and a reaction force, clearly demonstrating the relativity between action and reaction according to Newton's third law, helping to explain the phenomenon of rockets.

Link: https://drive.google.com/drive/folders/1_OMOHwZ8lzSDF5xip5t7tFERepHdPzFU?usp=sharing

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Ngô Thị Ngọc Khánh, Nguyễn Thị Hương Giang, Nguyễn Hà Tiên, Nguyễn Phương Thảo, Nguyễn Thị Kim Anh

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Ngô Thị Ngọc Khánh, Nguyễn Thị Hương Giang, Nguyễn Hà Tiên, Nguyễn Phương Thảo, Nguyễn Thị Kim Anh

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Explaination:

Why do rockets fly?

When you blow into a straw, a stream of air is created and moves through the tube. As air moves over the rocket's pointed tip, it creates a forward thrust. This happens due to the force of air pressure. This thrust pushes the rocket forward. This is why rockets are capable of flight.

Missile flight range and altitude?

The range and altitude a rocket can reach depends on the thrust created by the airflow and the shape of the rocket. As thrust is generated, the rocket will move at increasingly faster speeds. However, air resistance and gravity will prevent the rocket from moving farther and higher. To increase range and altitude, rockets need to have a slim shape to reduce air resistance and minimize the effects of gravity.

Rocket stability?

To ensure stable flight of the rocket, rocket wings are needed. The wing creates an opposite torque to counteract the rotation around the rocket's axis during flight. This helps the rocket maintain the desired flight direction and avoid instability.

Summary:

In short, rockets fly thanks to the thrust created by the air flow when you blow into a straw. The rocket's slim shape and wings play an important role in achieving maximum range and altitude, and help the rocket remain stable in flight.

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Pham Tra My, Nguyen Thi Hong Ngoc, Tran Thanh Hien, Nguyen Bao Ngoc

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Pham Tra My, Nguyen Thi Hong Ngoc, Tran Thanh Hien, Nguyen Bao Ngoc

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Paper rocket

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Đỗ Châu Anh - Lê Phương Anh - Nguyễn Thị Cẩm Tú - Nguyễn Thị Ngọc Hân

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Đỗ Châu Anh - Lê Phương Anh - Nguyễn Thị Cẩm Tú - Nguyễn Thị Ngọc Hân

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I. Design:

Materials you need.

papers

tape

scissors

straw

II. Explanation:

The flight of a straw rocket can fly because of the principles of physics, particularly the concepts of aerodynamics and Newton's third law of motion.

Rockets can fly due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. When a rocket engine burns fuel and expels exhaust gases out of the rocket's nozzle at high speed, it creates a force in one direction (action). According to Newton's third law, there is an equal and opposite force exerted in the opposite direction, propelling the rocket forward (reaction). This principle allows rockets to overcome gravity and achieve flight in space.

There is low pressure outside and high pressure within the straw when you blow air through it. The rocket experiences a net force in the direction of lower pressure as a result of this pressure differential. The rocket may speed forward due to this force and its streamlined design.

Newton's law states that there is a comparatively opposing reaction force that keeps everything in equilibrium. The air departing from the straw's mouth generates this reaction force, which pushes against the direction the air is moving.

III. Conclusion:

No fins: ~2m

Fins: ~4,8m

High: ~2m

In conclusion, creating a "rocket launcher" using a straw and paper typically leverages the principles of pressure and thrust. When you blow into the straw, the air inside the straw increases in pressure and generates thrust as it exits the back. By incorporating the paper to shape and structure of paper to device, the thrust from the air will propel the "rocket launcher" upwards. However, the efficiency and safety of this design may not be as high as professional flying vehicles

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 Lê Khánh Linh - Đồng Diễm Quyên - Nguyễn Hà Vân 

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 Lê Khánh Linh - Đồng Diễm Quyên - Nguyễn Hà Vân 

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BEYOND INFINITY

A paper rocket can fly because of the principles of aerodynamics and physics involved in its design and launch. Here's a simplified explanation:

Thrust: When you blow air into the paper rocket, it creates a force called thrust. This thrust propels the rocket forward.

Stabilization: The fins on the paper rocket help stabilize its flight. They prevent the rocket from tumbling or veering off course by keeping it pointed in the right direction.

Aerodynamics: The shape of the rocket is designed to minimize air resistance, allowing it to move through the air more efficiently.

Newton's Third Law: The rocket moves forward as a reaction to the air being forced out of the back of the rocket. This is in line with Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

In summary, the combination of thrust, stabilization, aerodynamics, and Newton's laws of motion allows the paper rocket to fly through the air.

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Dương Thùy Trang, Hoàng Châu Anh, Tạ Châu Giang, Nguyễn Đức Quân

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Dương Thùy Trang, Hoàng Châu Anh, Tạ Châu Giang, Nguyễn Đức Quân

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Non-fin: 3,2m

Fin: 3,6m

Explaination:

Straw rockets with fins tend to fly farther than those without fins due to the principles of aerodynamics.

1.                  Stability: Fins provide stability to the rocket during flight. When the rocket is launched, it experiences various forces, including drag and thrust. Fins help in keeping the rocket pointed in the right direction by counteracting any instability caused by these forces.

2.      Reduced Drag: Fins help in reducing drag. Drag is the resistance that opposes the motion of the rocket through the air. Fins create a streamlined shape, which reduces the overall drag on the rocket, allowing it to travel farther.

3.      Improved Flight Path: Fins help in controlling the flight path of the rocket. Without fins, the rocket may veer off course due to instability or aerodynamic forces. Fins provide directional stability, ensuring that the rocket maintains a straighter trajectory, which contributes to increased distance traveled.

4.      Increased Lift: Fins can also generate lift, which is the force that acts perpendicular to the direction of motion. This lift force helps in keeping the rocket aloft for a longer duration, allowing it to travel farther before gravity brings it back down to the ground.

In summary, the addition of fins to a straw rocket enhances its stability, reduces drag, improves its flight path, and increases lift, all of which contribute to its ability to fly farther compared to rockets without fins.

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Mai Đan Linh, Hà Thị Khánh An, Nguyễn Phạm Khánh Thư

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Mai Đan Linh, Hà Thị Khánh An, Nguyễn Phạm Khánh Thư

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https://drive.google.com/drive/folders/1--SWhVOEZy5uOPp2qCdJ71XTdK7Cwp-K?usp=sharing