Ron and hermoine are fighting over the monster book of monsters and they are both

The correct answer to the question is :  D) The book will not move.

EXPLANATION :

As per the question, Ron and Hermoine are applying same amount of force on the book.

Let the force applied by Ron is .

Let the force applied by Hermoine is

As per the question, the two forces are equal and opposite i.e anti parallel.

Hence, we may write two forces as .

Hence, the net force acting on the book is calculated as -

Hence, the net force on the book is zero. So, the book will not move.

Hence, the correct option of the question is option D.

I think the correct answer is the skier at the top.

Explanation:

cause potential energy is equal to mgh.

here mass and gravitational acceleration is same for all 3, but the top fellow has more height