37. A 1000-N crate is being pushed across a level floor at aconstant speed by a force F of 300 N at an angle of 20.0°below the horizontal as shown in Figure P4.37a. (a) What isthe coefficient of kinetic friction between the crate and thefloor? (b) If the 300-N force is instead pulling the block atan angle of 20.0° above the horizontal as shown in FigureP4.37b, what will be the acceleration of the crate? Assumethat the coefficient of friction is the same as found in (a).Figure P4.37µk= .256, a = .509 m/s241. The coefficient of static friction between the 3.00-kgcrate and the 35.0° incline of Figure P4.41 is 0.300. Whatmini-mum force F must be applied to the crateperpendicular to the incline to prevent the crate fromsliding down the incline?FIGURE P4.41F = 32.1 N58. (a) What is the minimum force of friction required tohold the system of Figure P4.58 in equilibrium? (b) Whatcoefficient of static friction between the 100-N block andthe table ensures equilibrium? (c) If the coefficient ofkinetic friction between the 100-N block and the table is0.250, what hanging weight should replace the 50.0-N
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