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During this process, Theworkdone by the gravity on the book is 18 J.The force that pulls a body toward the earth or any other mass-containing physical body is known asgravity.The result of force and distance traveled is what is referred to aswork done. Lifting anything off the ground involves working against gravity, whereas lifting something back down involves working in favor of gravity. It is inevitable for a particle to point in thedirection of gravityif an object is falling. Depending on its mass,gravitational constant, and altitude of descent, the falling body's size will change.According to the given question,Work done = Force * distanceYou lift the book= 1.52 MYou lift this against the force ofgravity.Force = mass * accelerationForce =Force = 11.77 NWork done =Work done = 17.89 JRounding it off, we get, work done 18 JTo learn more aboutwork, click here:brainly.com/question/18094932#SPJ4The given question is incomplete. The complete question is:A 1.2 kg book is lying on a 0.78 m -high table. You pick it up and place it on a bookshelf 2.3 m above the floor. During this process, how much work does gravity do on the book?...