# Justin's rocket

Define the problem Step 1:how can we a rocket to fly high and have the right things useing a roket

research step 3

the rockets are dangerous they go boom like the cines mad he flow far far away .

the first rocket was made in greece…………….. . the first man in space was a rushin

they use rocket for war in wwr war 1 they made them better and better and thin use them to kill one another thin some use them to make fireworks and the rocket has to be in good condition it has to go far and high well we had to test and test and we finally made it to the future we will be better more better plans for rockets and things and we can do more a whole lot more in the future in the beginning it was no success we feld all the time but as time moved on we got better and better till now rokets are unek they are amazing one of a kind shoot we could not get to space without rockets we would no fina andy answers without a rocket , it is the most cool ist thing known to man um they can be dangerous they blow up they can stall they can go boom you have to take a risk win you get in one the best one is the one that can go the highest and the first and the most bets

WEIGHT……………./////// the weight is the main reason if the rocket works or not it basically ways it down but it helps the more water you have

Weight is one of the three forces on a rocket seen in the rocket image below. Weight is the force generated on the rocket by the gravitational attraction of the earth. It is the combined mass of the rocket itself, including the fuel, and the payload, multiplied by the gravitational pull from earth. As shown in the rocket image below, weight opposes thrust - one of the other forces of flight. Weight pulls vertically downward through the rocket's center of gravity (CG). Center of gravity will be explained in more detail in the stability section.

thrust ……Thrust

Thrust is a force that produces lift-off, or upward movement of a rocket. Thrust acts through the center of gravity and must exceed weight in order to move the rocket off of the launch pad.

Thrust Acts Through the Center of Gravity

In a water rocket, a bottle is partially filled with water and a special pump is used to increase the air pressure inside the bottle. When launched, the high pressure inside the bottle forces the water out of the bottle nozzle. The ejected water leaves with a certain mass and velocity. The product of these terms is called momentum:

momentumwater = masswater x velocitywater

Newton's Third Law of Motion will help us understand how the rocket responds to this action.

Newton's Third Law of Motion

For every action, there is an equal and opposite reaction.

This tells us that the momentum of the rocket is equal to the momentum of the water being ejected from the bottle:

momentumwater = momentumrocket

or,

masswater x velocitywater = massrocket x velocityrocket

So how is this actionable? The relationship tells us that if we want to increase the rocket's velocity, we can do so by increasing the velocity of the ejected water, or by decreasing the mass of the rocket. How could you use this relationship to predict the rocket's performance if the bottle is simply filled with air? (Hint: the density of water is about 800 times the density of air.)

step 5// i chang the first one to more water power than the 2 one more wing exspachinthin off and on trying to find which one is better

Constraint  sketch 1

Sketch 2

Sketch 3

Total

Constraint

Sketch 1

Sketch 2

Sketch 3

Air pressure

Nose length

Number of fins

Parachute cost

Design cost

70.00

70.00

70.00

Nose length

Nose length

Number of fins

Parachute cost

Design cost

19.00

19.00

19.00

Number of fins

4

4

3

Parachute cost

55.00

56.00

65.00

Design cost

6.00\$

6.00\$

6.00\$

Total

6.00\$

6.00\$

6.00\$

step 7

input 65.00 water /70.00 psi /65 whigh