Group+6


 * Mythbusters & The Scientific Method **

=1. Explain the myth that you wish to investigate:= Myth: the possibility of jumping from a building using a parachute made from materials found around the house (e.g. Blankets) and if so, how large must this parachute be.

=2. What is your prediction and why do you believe this?= Probably not. It's suggested not to jump out of a window during a fire.

=3. What are the main physics concepts you will be considering (e.g. Inertia, Newton's 3rd Law, conservation of Momentum, etc.)= Inertia, Newton's 3rd Law Air resistance: ,

Terminal velocity.

Force of drag:

=4.What are the variables that you will be measuring in your experiment? What are the controls in your experimental setup=

= Controls = ·No wind ·same area for the "parachute" · similar weave for different materials =Variables=


 * different materials for the "parachute"


 * dropped from different heights

We will test natural fibres (wool, cotton, silk) and synthetic fibres ( polyester, rayon, nylon). For consistency we will use similar weaves for all materials.

=5. Describe your experiment in point form= Steps of the experiment: · ·

To test we will use 1msquare of each material and weight it with a weighed toy human figure. We will measure the terminal velocity of each material to determine the air resistance provided by the material for different heights dropped off until it reaches terminal velocity. This will give us the drag coefficient of each material

Central point of gravity for a human and be roughly determined by trying to balance a human lying on a hard board on a pipe horizontally and vertically.

Calculate the cushioning effect by measuring the distant of the central point of gravity traveled from the instant the human touches the ground (upright position) to the final position (crouching). Assuming it is constant deceleration, the instantaneous deceleration should be the same at each time interval, which can be calculated by using the formula **a = V2/2d**.

Also, the minimum initial height for the human to reach terminal velocity before reaching ground can be calculated by: **F = ma**， so the total acceleration would be g+a.

=6. How do you think you will analyze and present your data (types of charts, graphs, pictures, etc.)= excel with powerpoint including data and pictures

COMMENTS: