What is the coefficient of friction between two surfaces if a force of 10 N is required to slide a body of mass 5 kg?
Correct: B
The force of friction (f) is given by f = μmg, where μ is the coefficient of friction, m is the mass, and g is the acceleration due to gravity. Given, f = 10 N, m = 5 kg, assuming g = 10 m/s^2. Rearranging the equation to solve for μ gives μ = f/mg = 10/(5*10) = 0.2.