Your refrigerator has a mass of 119.0 kg, including the food in it. It is standing in the middle of your kitchen, and you need to move it. The coefficients of static and kinetic friction between the fridge and the tile floor are 0.45 and 0.30, respectively. What is the magnitude of the force of friction acting on the fridge, if you push against it horizontally with a force of each magnitude? (a) 300 N (b) 500 N (c) 700 N
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The normal force (N) is equal to the weight of the refrigerator, which is given by the mass (M) multiplied by the acceleration due to gravity (g). N = M * g N = 119 kg * 9.8 m/s^2 N = 1166.2 N Show more…
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Your refrigerator has a mass of $112.2 \mathrm{~kg}$, including the food in it. It is standing in the middle of your kitchen, and you need to move it. The coefficients of static and kinetic friction between the fridge and the tile floor are 0.460 and 0.370 , respectively. What is the magnitude of the force of friction acting on the fridge, if you push against it horizontally with a force of each magnitude? a) $300.0 \mathrm{~N}$ b) $500.0 \mathrm{~N}$ c) $700.0 \mathrm{~N}$
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You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is $200 \mathrm{kg},$ and you need to exert a force of $350 \mathrm{N}$ to make it just begin to move. a. What is the coefficient of static friction between the floor and the refrigerator? b. After it starts moving, the refrigerator reaches a speed of $2.0 \mathrm{m} / \mathrm{s}$ after $5.0 \mathrm{s}$. What is the coefficient of kinetic friction between the refrigerator and the floor?
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Consult Multiple-Concept Example 9 to explore a model for solving this problem. A person pushes on a 57-kg refrigerator with a horizontal force of ?267 N; the minus sign indicates that the force points in the ?x direction. The coefficient of static friction is 0.65. (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?
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