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Helicopter Investigation Aim: To investigate the factors that effect the time for a card helicopter to reach terminal velocity. Theory/Key Factors: When a helicopter wants to take off it starts its blades moving, and the blades push air under themselves until it they have enough air under them to take off. This is related to a sycamore seed, which is what I am basing my helicopters shape on. Terminal velocity is when air resistance is equal to the force of gravity acting on the helicopter. Therefore, the acceleration is zero and the helicopter falls at a constant speed. When my helicopter starts to spin it means that it has reached terminal velocity. The bigger the air resistance is on the helicopter is, the larger the surface area is, and consequently it will take longer to fall. The speed at which the helicopter falls at also depends on the conditions that I drop it...

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