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January 29, 2015

January 29, 2015

Posted by **sammi** on Wednesday, October 15, 2008 at 9:41pm.

for the first one do i use the formula F=-Kx to make the answer -4500 ?

and for the second i really have no idea what formula to use

what is the value for k if a spring stretches 0.4m when submitted to a 1800N force?

How much force is needed to keep a 23 kg box moving at a constant velocity across a warehouse floor if the coefficient of friction between the box and the floor is 0.88?

- physics -
**bobpursley**, Wednesday, October 15, 2008 at 9:42pmk=force/distance

moving at a constant veloicty? Well you have to supply force equal to friction: mg*mu

- physics -
**andy**, Wednesday, January 19, 2011 at 11:59pmk=F/x

=1800/0.4

=4500 N/m

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