Why is no work done when you hold a book in place over your head? 1. a force is applied to the book, causing it to move. 2. a force is applied to the book, but there is no move why is no work done when you hold a book in place over your head? a force is applied to the book, causing it to move. 3. a force is applied to the book, but there is no movement. 4. the book has motion, but no force is applied to it. ment. the book has motion, but no force is applied to it.

3. A force is applied to the book, but there is no movement.

Explanation:

As we know that work done is defined as

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.

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

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photocells convert light energy to electricity