Two identical books are placed on a bookshelf. Book number 1 is on a shelf one meter above the floor

Complete question is;

Two identical books are placed on a bookshelf. Book 1 is on a shelf one meter above the floor and Book 2 is on a shelf two meters above the floor.

Which statement best compares the potential energy of the books.

A) Book 2 has twice as much potential energy as Book 1

B) Book 1 has twice as much potential energy as book 2

A: Book 2 has twice as much potential energy as Book 1

Explanation:

Formula for potential energy is;

P.E = mgh

Where;

m is mass

g is acceleration due to gravity

h is height

Now, they are identical books and thus will have the same mass while acceleration due to gravity remains constant.

For book 1 which is 1 metre above the floor;

P.E = mg × 1

P.E = mg

For book 2 which is 2 metres above the floor;

P.E = mg × 2

P.E = 2mg

We can see that potential energy for book 2 is twice that of book 1.

Thus,option A is correct.

it becomes positively charged by charging it