# How fast do rockets go?

The rockets require a great speed to escape through the Earth’s gravitational force.

We will learn it in detail, but before that let us know what is rocket, and what is it used for?

Contents

### Rocket:

• Rockets are the device used to launch satellite into the space with required force to make them orbit in a particular trajectory.
• They have a powerful engine that allows them to push the spacecraft with a large blast that makes them orbit on a particular destined point.

### Uses for Rockets are:

• For a military use- missile are sometimes launched using rockets to attack on pointed places.
• For space use- rockets are used to launch spacecraft’s into space which then make them orbit in a particular trajectory. Spacecraft orbiting allows us to get worldwide news and internet, etc.

### Parts of Rockets:

• Nose cone- It is the first part of rocket which contains the load. It can be included as the astronauts, their equipment and even the general instructing system.
• Fins- They are placed on both the side of Rocket. Fins are responsible for balancing rocket.
• Rocket Body- This part of rocket holds the rocket engine. Fins are attached on the side of rocket body.
• Engine- This is the main place responsible for the speed of rocket. In this part there is the mixture of fuel that gives of big explosion making the rocket attain higher speed.

### Why we require a great amount of speed for a rocket?

• Our earth consist of a central force called as gravitational force.
• This force is responsible for all the things to be attached or attracted to the ground.
• For a rocket to escape through this force, there is a specific amount of speed required, known as Escape Velocity.
• To attain escape velocity, rocket should be in very fast speed.
• Or else, rocket can be pulled back to earth due to gravitational force.
• For a rocket to escape Earth surface, the speed for escape velocity is about 40,250 km per hour.
• The highest seed ever achieved was by Helios A and Helios B spacecraft, which travelled at about 44 miles in a second.

### Fun Facts:

1. A typical rocket is at least about 30 times more faster than the original passenger jets.
2. The first rocket in space was launched by a country named Germany in 1942.
3. The most largest rocket is of about 300 feet tall.

1. What is gravitational force?
2. What is escape velocity?
3. What is spacecraft?

### True or False:

1. Rockets need to escape through Earth’s gravitational force to launch a satellite.
2. Rocket goes by a very less speed.
3. Rockets are used for travelling in space.
4. Rockets are divided into six sections.
5. The velocity require escaping through Earth’s gravitational field is called as gravitational force.

### Objective Quiz:

1. Rockets are used to launch ________.
1. Satellite.
2. Car.
3. Motor bike.
4. None of the above.
2. The force responsible for us to be attached or attracted to ground is known as ________.
1. Gravitational Force.
2. Moving Force.
3. Rotational force.
4. None of the above.
3. The part of rocket carrying astronauts is named as ______.
1. Nose cone.
2. Fins.
3. Engine.
4. All of the above.
4. ______ is the speed required by rocket to escape Earth’s gravitational force.
1. Escape velocity.
2. Escape gravitation velocity.
3. Both 1) and 2).
4. None of the above.
5. ______ part of engine is responsible for the rocket to attain higher speed.
1. Engine.
2. Fins.
3. Nose cone.
4. All of the above.

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