As stated almost answerable.
If no friction exists, any movement imparted will be in the form of velocity and will last 'forever' (with no friction and if it never impacts another object).
given you are asking for distance rather then velocty, the friction becomes very important.
A 4200lb pieces of wood, lying a concrete is going to move far less, then a 4200lb block of ice sitting on a water covered frozen lake for example.
As stated it is not possible to give a direct answer, the best that could be provided is a forumla with the friction as an unknownHow fas would an object 3700lbs have to be traveling to push and object 4200lbs aprox. 20 feet?
If there is no friction, then any speed would do. It would just take longer at lower speeds.
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