Define coefficient of static friction and coeficient of kinetic friction .

Define static friction?

Define friction?

What is cone of friction

A block of mass 2kg is placed on the floor. The coefficient of static friction is 0.4. A force F of 2.5N is applied on the block . Calculate the force of friction between the block and the floor.

The maximum speed that can be attained by a car, without skidding, on a horizontal circular road of radius R and coefficient of kinetic friction mu is

The maximum speed that can be attained by a car, without skidding, on a horizontal circular road of radius R and coefficient of kinetic friction mu is

A block weighing 250N is pulled over a horizontal plane at a constant velocity up to a distance of 10 m. The coefficient of kinetic friction is 0.2 and the force is applied by a string, attached with the block, inclined at 60^@ with the vertical . Find the work done against friction.