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The human body can survive a negative acceleration trauma incident (sudden stop) if the magnitude of the acceleration is less than 243 m/s2. If you are in an automobile accident with an initial speed of 127.0 km/h and are stopped by an airbag that inflates from the dashboard, over what distance must the airbag stop you for you to survive the crash?

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Fall semester, eh? http://forumserver.twoplustwo.com/sh...o=&fpart=1


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Earthquakes produce several types of shock waves. The most well-known are the P-waves and the S-waves. In the earth’s crust, the P-waves travel around 7.0 km/s while the S-waves move at about 3.6 km/s. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 19 s, how far away from the seismic station did the earthquake occur?

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If the time delay was 1sec, then what was it?

You didn't really spend two hours on this.