Acannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. ideally (no air resistance) the ball will land on the ground with a speed of

As we know that here no air resistance while ball is moving in air

So here we will say that

initial total energy = final total energy

here we know that

(as it will be on ground at initial and final position)

so we will say

since mass is always conserved

so we will say that final speed of the ball must be equal to the initial speed of the ball

so we have

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