A1.70-m tall person lifts a 2.50-kg book from the ground so it is 2.40 m above the ground. part awhat is the potential energy of the book relative to the ground? express your answer to three significant figures and include the appropriate units. part bwhat is the potential energy of the book relative to the top of the person's head? express your answer to three significant figures and include the appropriate units. part chow is the work done by the person related to the answers in parts a and b? 1. the work done by the person in lifting the book from the ground to the final height is the same as the answer to part a2. the work done by the person in lifting the book from the ground to the final height is the same as the answer to part b

Part a)

Part b)

Part C)

work done by the person to bring the book is same as the answer solved in part A)

Explanation:

Part a)

potential energy of book with respect to the ground position is given as

here we know that

m = mass of book

g = 9.81 m/s/s

h = height of the book with respect to the initial reference level

Part b)

now we have to find the potential energy of the book with respect to the top head position of the person

here we know

now from above formula we have

Part C)

work done by the person to put the book at given height is given as

here we know that

Now work done is given as

so work done by the person to bring the book is same as the answer solved in part A)

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