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April 25, 2014

April 25, 2014

Posted by **Harold** on Monday, March 16, 2009 at 11:46pm.

I say eight times as fast?

- Physics -
**drwls**, Tuesday, March 17, 2009 at 12:03amNo. If the retarding force is constant (which means independent of speed), and you want it to penetrate four times as far, it will have to do four times as much work against the mud. That will require four times the kinetic energy.

I think this is an unrealistic problem. Fluid resistance forces are not independent of velocity.

- Physics -
**Anonymous**, Sunday, January 6, 2013 at 4:11pmtwice as fast

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