Wow your question looks crazy, the answer is that there IS a force on the book, there always is! Atleast when you're on earth anyways, but why is there no work being done? Because it's not moving. Which sounds like 3 to me.
But I want you to understand this, W = Fdcos(x), there's no distance here, so the W = 0
Answer:
3. A force is applied to the book, but there is no movement.
Explanation:
As we know that work done is defined as
[tex]W = Fdcos\theta[/tex]
Now we know that
F = force on the object
d = displacement of the object
Now since here book is hold at the head of the object and there is no displacement of the book
So the work done is zero here
as d = 0
So correct answer will be
3. A force is applied to the book, but there is no movement.
