Applied Mechanics and Graphic Statics
The ratio of unit of force in gravitational system to that in absolute system is (where ‘g’ is acceleration due to gravity)
For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction
The force of friction always acts in a direction opposite to that in which a body is moving
EXAMIANS