a very light ideal spring with a spring constant (force constant) of 250 n/m pulls horizontally on an 18-kg box that is resting on a horizontal floor. the coefficient of static friction between the box and the floor is 0.65, and the coefficient of kinetic friction is 0.45. (a) how long is the spring just as the box is ready to move? (b) if the spring pulls the box along with a constant forward velocity of 1.75 m/s, how long is the spring? (c) how long is the spring if it pulls the box forward at a constant 2.75 m/s?

the answer for apex is the lowest

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