- #1
Angela_vaal
- 59
- 1
Homework Statement
What is the minimum horizontal force F needed to make the box start moving in (Figure 1) ? The coefficients of kinetic and static friction between the box and the floor are 0.28 and 0.39, respectively.
Homework Equations
fk=mu N
fs=mu N
The Attempt at a Solution
Im not sure that the N pointing downward is the normal force or not because I though normal force = 25kg* 9.81m/s2=245?
so would the minimum force be Fs= mu N... (.39)(245)=96?
i just don't know what the 31 N signifies since it is pointing downward? help please
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