Knowing this, we can program our impact force monitor to alert us if our accelerometer measures a G-force above either of these thresholds. Research has found that g-forces above 9G can be fatal to most humans (without special training), and 4-6G can be dangerous if sustained for more than a few seconds. However, it is useful when talking about collisions because acceleration ( the change in speed and/or direction) is what damages the human body.įor this project, we'll use G-force units to determine if an impact is potentially dangerous and deserving of medical attention. Technically speaking, g is an acceleration, not a force. When we use units of G-force, we are measuring an objects acceleration relative to free fall towards the earth. Place a piece of paper between the ball and the electromagnet to ensure that the ball falls immediately when the switch is flicked. Record the shortest time of fall for each height. Since s ½gt², the value of g is calculated by g 2 × slope. (This is why we have airbags: to increase the distance of our impact.)įorce is typically measured in Newtons (N), but impact force may be discussed in terms of a "G-Force", a number expressed as a multiple of g, or earth's gravitational acceleration (9.8 m/s^2). Draw a 'best fit' straight line and measure its slope. Impact force is inversely proportional to impact distance, meaning that the impact force decreases if the impact distance increases.Impact force is directly proportional to the kinetic energy, meaning that the impact force increases if the kinetic energy increases. 575 X 12,600,000 Eliminating C from these equations, there results.There are two key takeaways from this equation: It takes the initial velocity, gravity and time as inputs and solves for the other variables. Where F is the impact force, KE is the kinetic energy (energy of motion), and d is the impact distance, or how much the object crunches. Free Fall Calculator is a tool that computes the distance, velocity and time of an object falling freely under the influence of gravity.
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