a 2kg book falls off the top of a 2.3m bookshelf. how much work is required to lift the book back to it's original position? gravity acceleration is 9.58 m/s ²​

44.068 J

Explanation:

From the question,

Work(W) = mgh Equation 1

Where m = mass of the book, g = acceleraton due to gravity, h = height.

Given: m = 2 kg, h = 2.3 m, g = 9.58 m/s²

Substitute these values into equation 1

W = 2×2.3×9.58

W = 44.068 J

Hence the work required to lift the book is 44.068 J