As shown below, a 450-kg roller-coaster car starts from rest at point A at a height of 47 m the track, reaching point B and then rolls up a second hill where it reaches a height of 23 m at point C). What are the gravitational potential energy and kinetic energy of the car when it is at points A, B, and C? What are the velocities at point B and C?

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