are side-impact airbags that are designed to protect passengers and drivers from a side impact crash and even help prevent being thrown from the vehicle if the vehicle rolls over after being struck from the side.

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?