Posted by Brandon on Wednesday, January 5, 2011 at 9:07pm.
A weight W is now placed on the block and
7.7 N is needed to push them both at constant
velocity.
What is the weight W of the block?
Answer in units of N.

Physics  drwls, Wednesday, January 5, 2011 at 10:18pm
Information from a previous question, probably about the coefficient of friction, is needed to answer this.

Physics  Anonymous, Thursday, February 2, 2012 at 2:37pm
What you need to do is use the equation
Ffriction=coefficient of friction*Normal.
and remember that normal is the total weight of the objects.
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