The kinetic energy of a particle moving along a circle of radius `R` depends on the distance covered `s` as `K=lambdas^(2)`, where `lambda` is a constant. Find the force acting on the particle as a function of `s`.
A. `2a(s^(2))/(R)`
B. `2as(1+(s^(2))/(R^(2)))^(1//2)`
C. `2as`
D. `2a(R^(2))/(s)`
