Chional force Difference between the kinetic forlad frictional and 5 totic Actional force (4) box is placed on a rough surface, it has a normal sorce of 120 force of magnitude 20 m is applied to the cight and cannot m io box. Calculate the magnitude and the direction of tho ictional forces if the coefficiont of stotic frictional force is 0,2
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The maximum static frictional force can be calculated using the formula: \( f_s = \mu_s \times N \), where \( \mu_s \) is the coefficient of static friction (0.2) and \( N \) is the normal force (120 N). So, \( f_s = 0.2 \times 120 = 24 \) N. This means that the maximum static friction opposing the applied force can be 24 N. Since the applied force of 20 N is less than the maximum static frictional force of 24 N, the box will not move. Thus, the magnitude of the frictional force acting on the box is equal to the applied force, which is 20 N acting in the opposite direction of the applied force (to the left).