Consult to explore a model for solving this problem. A person pushes on a 61-kg

Question

Consult to explore a model for solving this problem. A person pushes on a 61-kg refrigerator with a horizontal force of -250 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.66. (a) If the refrigerator does not move, what are the magnitude and direction of the static frictional force that the floor exerts on the refrigerator? (b) What is the magnitude of the largest pushing force that can be applied to the refrigerator before it just begins to move? Assume g = 9.8 m/s2.

Explanation / Answer

a)The frictional force = coeff of friction * mass *gravity

So static frictional force = .66*61*9.81 =394.95N

And the force is in the positive x axis ie) +x axis opposite to force

B) the magnitude of largest force applied to refrigerator before it started should be equal or greater than the frictional force

So mag of largest pushing force = 394.95 N

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