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6 Οκτ 2018 · With this constant velocity, we can calculate the time to impact using just the definition of average velocity in one dimension: Using the values of 15.6 m/s for the velocity and a distance of...
An elastic collision is a collision between two or more bodies in which both momentum and kinetic energy are conserved. This concept is central to many areas of physics, such as the kinetic theory of gases, nuclear physics, and particle physics.
14 Ιουν 2011 · Get the full scoop on how airbags save lives. (Hint: it's a very fast, very violent, well-controlled chemical reaction.)
25 Οκτ 1999 · The chemical equation 2 NaN 3 --> 2 Na + 3 N 2 describes exactly how it falls apart. Notice that the second product of the above reaction is N 2, also known as nitrogen gas. A handful (130 grams)...
Air bags are made from a strong coated fabric. They are stored in a module mounted on the steering wheel and dashboard and side panels of the car. The inflation of them is initiated by crash sensors that activate upon impact at speeds of more than 10-15 miles per hour.
Airbags allow the net force on the occupants in the car to act over a much longer time when there is a sudden stop. The momentum change is the same for an occupant whether an airbag is deployed or not. But the force that brings the occupant to a stop will be much less if it acts over a larger time.
Force and time is inversely proportional in momentum calculation so if time is increased, force is decreased. The airbag is designed so that it can increase the time required to stop our body momentum in a collision, reducing force impact, minimise injury to our body.
