How many feet does a 700 lb object take to stop?

[logan97]

hope I am in the right forum?

how many feet does a 700 lb object take to stop? @ 20 mph, 30 mph, 40 mph ?

 

[schip666!]

Zero...If it hits the proverbial Immovable Object.
Otherwise you need to know something about what's stopping the object, like friction.

 

[logan97]

Zero...If it hits the proverbial Immovable Object.
Otherwise you need to know something about what's stopping the object, like friction.

sorry not enough info. It would be brakes on a 4 wheeler motorized vehicle.

 

[dav2008]

To point you in the right directions, I am sure there are institutions (Department of Transportation?) that have "rules of thumb" charts about stopping distances for certain kinds of vehicles of certain weight in certain weather conditions with certain types of tires.

Maybe someone else can point you to a source or you can see if Google turns up anything.

 

[schip666!]

This brings up foul memories of how I almost failed my driver's-ed class due to a poorly constructed question about using the stopping distance formula which had been pounded into us by our autocratic (pun intended) teacher...

OK. It's been 45 years. I'm over it and can now just google "automobile stopping distance" to find this handy explanation and chart:

http://www.csgnetwork.com/stopdistinfo.html