newtonian mechanics - Why doesn't static friction point down the
In the figure above in which the sphere rolls without slipping down an incline, why is static friction directed upward? Static friction is meant to oppose impending motion so it should oppose the o
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Why isn't the kinetic friction equation a vector equation? What is a vector equation? - Quora
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A block of mass 10 kg is placed on rough inclinedplane of inclination angle 37. Coefficient of frictionbetween block plane is 0.8, find minimummagnitude of F so that block remains at rest.