3. A child lifts a book of mass 1 kg from the table to a cupboard at a – InterviewSolution

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1.	3. A child lifts a book of mass 1 kg from the table to a cupboard at a height of 2 m from the floor. What is the potential energy of the book with respect to the floor?
Answer» 20 joulesExplanation:GIven:Mass of the BOOK = m = 1 kg Height to which the book is lifted = h = 2 metresGravitational force = g = 10 m/sTo find:POTENTIAL energy of the book with respect to the floorPotential energy = mass × gravitational force × heightPotential energy = 1 × 10 × 2Potential energy = 10×2Potential energy = 20 JoulesThe potential energy possesed by the book with respect to the FLOOR is equal to 20 joules

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