Which of the following statements about friction is NOT correct? A.The force of kinetic friction is less than the force of static friction B.The force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged C.The force of rolling friction between two surfaces is less than the force of sliding friction D.The angle of friction is the angle between the normal reaction and the force of friction E.Friction may be reduced by lubrication

Choose the correct optionSelect an answerAThe friction force is dependent on the roughness of surface.BThe kinetic friction is proportional to normal reactionCThe friction is independent on the area of contactDAll statement are correct.

Which of the following statements in incorrect about friction?Group of answer choicescoefficient of kinetic friction depends on the speed of motioncoefficient of kinetic friction depends on the normal force on the objectcoefficient of kinetic friction depends on acceleration of the objectcoefficient of kinetic friction does not depend on the direction of motioncoefficient of kinetic friction depends on the direction of motion

Which of the following statements about friction is TRUE?A. Friction opposes motion of objects.B. Friction occurs between non-rubbing surfaces.C. Friction causes moving objects to move faster.D. Friction acts in a direction similar to the direction of an object’s motion

Which of the following statements about friction is TRUE?A. Friction opposes motion of objects.B. Friction occurs between non-rubbing surfaces.C. Friction causes moving objects to move faster.D. Friction acts in a direction similar to the direction of an object’s motion.2. Will it be easier for a person to push a table on a carpeted floorthan on tiled floor?A. No, because the carpeted floor is rough, so friction is lesser.B. No, because the carpeted floor is rough, so friction is greater.C. Yes, because the carpeted floor is smooth, so friction is lesser.D. Yes, because the carpeted floor is smooth, so friction is greater.3. When can we say that friction on a floor is greater?A. If the floor is wet.B. If the floor is tiled.C. If the floor is rough.D. If the floor is smooth.4. Which force causes a rolling ball to stop after a few seconds?A. frictionB. gravityC. magneticD. motion5. Why is difficult to move heavy objects on a rough surface?A. rough surface is slipperyB. there is no friction on a rough surfaceC. there is lesser friction on a rough surfaceD. there is greater friction on a rough surface6. When you are travelling along a road, how does the wet road affect friction?A. It increases friction.B. It decreases friction.C. It maintains friction.D. It increases and decreases friction.What I Know

The force of kinetic friction between two surfaces is independent of the area of contact between the surfaces.Group of answer choicesTrueFalse