Homework Help: physics

Posted by swow on Sunday, July 4, 2010 at 7:35am.

In thrill machine rides at amusement parks there can be an acceleration of 3g or more.But without head rests acceleration like this would not be safe. think why not?

physics - Damon, Sunday, July 4, 2010 at 9:40am
Try pulling back on your neck with three times the weight of your head.

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