If the applied force is doubled coefficient of friction isSelect an answerAHalvedBTripledCDoubledDNot change

Hence calculate the coefficient of friction for this situation.

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 is true for coefficient of static friction for a pair of substances?Group of answer choicesIt does not have a unitIt can vary from 0 to a maximum value depending on the applied forceIt is constant and has a unit of Nit can vary from 0 to 1 depending on the acceleration of the moving objectit is constant and has a unit of m/s2

A brick slides on a horizontal surface. Which of the following will increase the frictional force on it?Group of answer choicesIncreasing the speed of the brick as it slidesIncreasing the surface area of contactDecreasing the mass of the brickDecreasing the surface area of contactPutting a second brick on top

Which describes the coefficient of friction?A. The force applied to overcome the friction of a stationary objectB. The force between interfacing surfaces of two bodiesC. The ratio of opposing forces acting between two bodies in motionD. The ratio of the force of friction between two bodies and a normal reaction force