Answer:
Work done to pull the book upwards is 5.6 J
Explanation:
As we know be the relation of work and potential energy that change in gravitational potential energy of the system is equal to the work done on it
so we will have
[tex]W = U_f - U_i[/tex]
when book is placed on the ground then its initial potential energy is given as
[tex]U_i = 0[/tex]
final position potential energy is given as
[tex]U_f = 5.6 J[/tex]
now we have
[tex]W = 5.6 - 0[/tex]
[tex]W = 5.6 J[/tex]
