Question

A book is lying on a table, what is the angle between the book on the table and the weight of the book?

• A. $0^o$
• B. ${45}^o$
• C. ${90}^o$
• D. ${180}^o$

Answer 1

The correct option is C ${90}^o$

Weight always point towards the center of the earth that is perpendicular to the surface of the earth that is towards the table and $perpendicular$ to surface of the table.

Now as the book is lying on the table i.e. book is $parallel$ to the table and the weight is perpendicular to the table so the required angle is ${90}^0$

Option C is correct.