Step 4: After finalising fin design and construction, mark where the fins will be placed on the rocket, then attach to said rocket (for this experiment, a hot glue gun was used to attach the fins) Step 5: After Step 4: chose and finalise design for parachute (in this experiment, a circular parachute was chosen to be constructed, cute out of a black garbage bag, with a diameter of 65cm). fin design, how many fins will be needed, nose cone design, parachute design,В bottle type) Step 2: Gather all materials needed to construct rocketВ Step 3: Begin with constructing the fins, trace design and cut them out of chosen material for the fins (for this experiment, thin cardboard manila folders were used). Step 1: First, brainstorm ideas for design of water bottle rocket (e.g. The apparatus used throughout this investigation included: The controlled variable involved in this experiment is time again. The dependent variables involved in this experiment are height, the angle of the rocket, the water level inside the rocket and the overall acceleration of the rocket.

The independent variable involved in this experiment is time. The variables involved in this investigation are categorised into three sets independent, dependent and controlled. I hypothesise that our rocket will reach heights to about 20m, at an acceleration rate from 8m/s to 15m/s. It is to observe the effects a range of variables has on the water rocket and how those variables affect the results gathered. The aim of this task is to research the key principles of rocket design and stability needed to develop the rockets. This experiment is being conducted to explore the diverse variables involved with the rockets and how they function, and to analyse and explore further investigations included in the subject of the physicsВ field that contributed to the understanding of the rockets. Some general tips for the fin design are that they should be thin or tapered, angled backwards and with rounded corners rather than sharp corners (Williams, 2014).

If the fins are too far forward on the rocket it could put off the centre of mass and therefor cause the rocket to become heavily unstable. Considering the design of the bottle rocket, fins play a major role in steadying and effectively pushing the rocket to increase the rockets aerodynamics. When the rocket launched, there will be air drag and gravity pulling against the rocket, along with the upward thrust provided. Newtons Third Law: вЂ“ For every action, there is always an opposite and equal reaction.

The acceleration of the rocket will depend on how much thrust and force is put behind the upward strength to aid the rocket. Newtons Second Law: вЂ“ The acceleration of an object is directly related to the force exerted on the object and oppositely related to the mass of that object. When the water rocket is pressurised, the forces become unbalanced and thrust will provide upward direction for the rocket to follow. When the rocket is sitting in the launcher, the forces are balanced because the surface of the launched pushes the rocket up while the force of gravity forces it down. When constructing the rockets, there are things to consider: Newtons First Law: вЂ“ Objects at rest will stay at rest, or objects in motion will stay in motion unless acted upon by an unbalanced force.

Best fin shape rocket bottle