The support force on a 10-N book that rests on a horizontal surface is
A)less than 10 N.
B)10 N.
C)greater than 10 N.
D)dependent on whether the book lies flat or stands upright.

Question

Quizplus · Accepted Answer

According to Newton's Third Law of Motion, the book applies a downward force of 10 N on the horizontal surface due to its weight. As per the law of action and reaction, the surface exerts an equal and opposite force of 10 N upward on the book, which is the support force. Therefore, the support force on the book is exactly 10 N.

The Support Force on a 10-N Book That Rests on a Horizontal