29/09/2026
99% Trap Question! RE-NEET Physics | Solve Variable Friction in Seconds
📌 Question:
A particle of mass M moves along a horizontal x-axis from x = 0 to x = L. The coefficient of kinetic friction varies as a function of x as mu_k(x) = mu_0 - alphax, where mu_0 and alpha are constants of appropriate dimensions, so that mu_k(L) = 0. The total work done by the frictional force during the motion is nmu_0Mg*L, where g is the acceleration due to gravity. Find the value of n.