Question

13. A 0.5 kg (4.9 N) book rests on your desk. An additional force F = 1.1 N is applied on this book in vertically
downward direction. Normal reaction on this book will be?
​

Answer 1

A book of mass 0.5 kg (weight = 4.9N) rests on my desk as shown in figure . now a force F = 1.1N is applied on this book in vertically downward direction.

at equilibrium,

downward force = upward force

or, F + weight of body = normal reaction

or, 1.1N + 4.9N = normal reaction

or, normal reaction = 6 N

hence, normal reaction on this book will be 6N.

Answer 2

answer is given in the attachment below