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.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.