Which of the following is not true about friction force? Friction force is always directly proportional to the weight of the body. Friction force always acts opposite the direction of sliding or impending motion. Friction force is independent of the surface area in contact. Kinetic friction force cannot be greater than static friction.
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Friction force is dependent on the normal force acting on the object, which is equal to the weight of the object only when the object is on a horizontal surface. In other cases, the normal force may be different from the weight of the object. Show more…
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Which of the following statements about friction is true? a. Friction is inversely proportional to the normal component of the force pressing the surfaces together. b. Friction is independent of the surface area in contact. c. The coefficient of kinetic friction is usually greater than the coefficient of static friction. d. The coefficient of kinetic friction is inversely proportional to the sliding speed.
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Which is usually greater, the maximum force of static friction or the force of kinetic friction?
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