A box is sliding with a speed of 4.50m/s on a horizontal surface when, at point P, it encounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at 0.100 at P and increases linearly with distance past P, reaching a value of 0.600 at 12.5m past point P.

(a)Use the work-energy theorem to find how far this box slides before stopping.

(b)What is the coefficient of friction at the stopping point?

(c)How far would the box have slid if the friction coefficient didn't increase, but instead had the constant value of 0.100?

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

helium

oxygen

neon

sodium