Wednesday
December 17, 2014

Homework Help: Physics

Posted by Anonymous on Saturday, October 31, 2009 at 3:32pm.

5) You are pushing a 55 kg refrigerator along at a constant speed of 1.5 m/s using an applied force of 250 N when the floor type changes from tile to carpet. The carpet has a coefficient of static friction of 0.62 and a coefficient of kinetic friction of 0.54. Are you pushing with enough force to keep the refrigerator moving?

No, because the force of static friction is greater than the pushing force

None of these explanations is correct

Yes, because it is already moving, it doesn't matter if the surface type changes because all surfaces have the same coefficient values

No, because it is moving at a constant speed so the net force is zero.
i'm thinking it is the 3rd option.

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