defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Engineering Mechanics Equilibrium and Friction
In limiting friction, the resultant reaction R, the normal reaction N and angle of friction ϕ, are related as
1
N = R cos ϕ
2
N = R sin ϕ
3
R = N cos ϕ
4
R = N sin ϕ