INTRODUCTION

Water rocket is a type of  model rocket using water as

its reaction mass. The pressure vessel — the engine of the rocket — is

usually a used plastic soft drink bottle. The water is forced out by a

 pressurized gas, typically compressed air. It is an example

of  Newton's third law of motion. 

The term “aquajet” has been used in parts of Europe in place of

the more common “water rocket” and in same places they also

referred to as “bottle rockets” (which can be confusing as this term

refers to a firework in other places). 

 

How Mass Affect a Landing Distance of a Water Rocket

Aim:

To investigate the relationship between mass of water and landing distance of water

rocket.

Problem:

How does mass of water affect landing distance of water rocket?

Variables:

Manipulated variable: Mass of water

Responding variable : Landing distance of water rocket

Fixed variable : Angle of launching water rocket

Hypothesis:

The mass of water increases, the landing distance of water rocket increases.

Inference:

When mass of water is 500g, landing distance of water rocket is the furthest because

the amount of water is optimum.

Apparatus and material:

1.5L water bottle, small plastic cone(athletic), duct tape, scissors, manila folder.

Procedure:

1.  Cut the top and bottom off of water bottle, so that the center portion or a

cylinder remains.

2.  Make the fins using manila folder. Cut three triangular shapes out of the folded

 bottom in the shape.

3.  Tape the three fins on the rocket. Be sure that the fins are spaced equally

around the rocket body.

4.  Use the athletic cone to make your nose cone.

5.  Use scissors to cut the bottom square off of the cone.

6.  Fill the water bottle with water mass of 250g, then attach it to the launcher.

7.  Launch the rocket then record the landing distance of the water rocket.

8.  Repeat step 6 to 7 by using different mass of water, 500g and 750g with other

factors remain unchanged.

 

Diagram:

Water Rocket

Launching Water Rocket