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Path of Rockets flight

Last updated over 3 years ago
10 questions
Note from the author:
part of Water Rocket Unit

Answer all questions in Full Complete Sentences


You cannot use the word "it" as the subject of your sentences


All the answers are here in this document

Part 1

Stages of a Flying Rocket
Stage 1 Air pressure launches your bottle rocket.
Stage 2 Thrust pushes the rocket upwards
Stage 3 The rocket coasts to the top of its flight.
Stage 4 The rocket plummets to earth after reaching its apex.

All the motion of a rocket results from thrust. Thrust is defined as any force tending to make an object move. In a rocket engine, thrust is the force that pushes the engine forward or up. What produces the thrust for our rocket?

To understand how thrust operates we can look at the work of the famous scientist Isaac Newton. One of his discoveries was the Laws of Motion. His third law of motion explains many numbers of things. One is how rockets work. His third law of motion states: For every action there is an equal and opposite reaction.
Required
1

Define Thurst

Required
1

What is Newton’s 3rd law of motion?

Part 2

You have seen this law in action around you. If you have shot a rifle you have felt this law at work. When a rifle is fired and the bullet is forced out of the barrel; this is the action. The gun then kicks backwards; this is the reaction.

Or suppose you are standing on a skateboard and you jump off backwards. Your jump backwards is the action, which causes the skateboard to shoot forward which is the reaction.
Required
1

Explain how riding a stakeboard is an example of Newton's 3rd Law.

You cannot use the word "it" as the subject of your sentences

Part 3

Newton's third law explains the generation of thrust by a rocket engine. In a rocket engine, hot exhaust gas is produced through the combustion of a fuel. The hot exhaust gas flows through the rocket nozzle and is accelerated to the rear of the rocket. In re-action, a thrusting force is produced on the engine mount. The thrust accelerates the rocket as described by Newton's second law of motion

As the rocket speed increases, it encounters aerodynamic drag, which opposes the motion. Drag is air resistance. The thrust of the rocket must be greater than the weight plus the drag for the rocket to continue accelerating. If the thrust becomes equal to the weight plus the drag, the rocket continues to climb at a fixed speed, but it does not accelerate. This will happen to your water rockets after they are launched.
Required
1

How is thrust created in a rocket engine?

Part 4

In liquid fuel rockets, the burning fuel gives off hot, expanding gases which provides the force to launch the rocket. These gases escape through the rockets nozzle. These engines are designed to be used only in space and probably be the choice of rocket engines for trips to other planets.

Electric rocket engines use the power of electricity to provide thrust for the rocket. Electric energy is used to heat liquids which then pass out the rocket nozzle and create thrust. The main problem with electric engines is that they are heavy and not well suited for large rockets. Smaller electric rocket engines are used on some satellites.

Water rockets use air pressure to provide the thrust into air. Pressured Air has very little mass so water is added to provide greater thrust. When the rocket launch pin is pulled the water starts to exit at high speed due to the pressure inside the rocket body forcing the water out. As the water exits , the water accelerates downward due to a large downward force. By Newton's third law there is also an equal and opposite force pushing upward on the rocket, causing the rocket to accelerate upward. Now we are likely not going to get our rockets into outer space but the world record is 3,155 feet (2019). Jepson’s record is 526 ft and we certainly could aim for that mark.
Required
1

What are the three types of rockets used today?

Required
1

What type of rocket engines may be used to travel to other planets?

Required
1

What are electric rockets engines used for?

Required
5

Explain how water rockets are launched

Required
0

Did you turn in to Mrs Coldiron your Drawing of Path and Parts of the rocket?
zero point question, just a reminder,

Required
1

Check each of your answers, did any of your sentences start with the word "it", if so please fix